La 3 parece que se ha puesto de relleno porque no viene al caso.

La 4 podría hacer dudar si no eres patólogo

Creo que la respuesta correcta es la 5; la PAAF no permite hacer un estudio histológico si no citológico por lo tanto se eliminan las preguntas 1, 2. La 3 parece que se ha puesto de relleno porque no viene al caso. La 4 podría hacer dudar si no eres patólogo perola respuesta más lógica es la 5 ya que el carcinoma papilar es el más frecuente.

Creo que [HIDDEN]; la PAAF no permite hacer un estudio histológico si no citológico por lo tanto se eliminan las preguntas 1, 2. La 3 parece que se ha puesto de relleno porque no viene al caso. La 4 podría hacer dudar si no eres patólogo pero [HIDDEN] ya que el carcinoma papilar es el más frecuente.

Un hombre de 41 años acude a consulta por un nódulo en el tiroides derecho se realiza una punción aspiración con aguja fina. El análisis citológico nos permitirá:

Distingue entre adenoma folicular o carcinoma folicular mínimamente invasivo.

Identificar las zonas de invasión capsular o vascular del carcinoma folicular.

Reconocer la hiperplasia de células G asociadas a cáncer medular familiar.

Distinguir entre un tumor de células de Hurthle y un adenoma folicular oxifilia.

Identificar las características citológicas típicas del carcinoma papilar.

Sarcoma de células dendríticas foliculares. Informe de un caso.

El sarcoma de células dendríticas foliculares es una enfermedad rara, caracterizada principalmente en sitios nodales como la cabeza, el cuello y la orofaringe, aunque puede ser extranodal, como en el bazo y el hígado. En la mayoría de los casos cursa asintomática, pero puede presentar síntomas generales, dolor abdominal o fiebre. La inmunohistoquímica es indispensable para llegar a un diagnóstico definitivo. Mujer de 40 años, con abultamiento submaxilar en el cuello, región frontoparietooccipital derecha, y sequedad de mucosa oral. Se manejó inicialmente como un síndrome de Sjögren, que fue descartado por el resultado histopatológico de la biopsia de glándula salival. Posteriormente se realizó biopsia de ganglio del cuello, que reportó sarcoma de células dendríticas foliculares con expresión inmunohistoquímica positiva para CD23 y negativa para CD21 y ACL. Se manejó con samario y tuvo una sobrevida de 3 meses desde el diagnóstico. el sarcoma de células dendríticas foliculares es raro y la sobrevida es corta. Follicular dendritic cell sarcoma is a rare pathology, it occurs mainly in nodal sites such as head, neck, oropharynx, although extranodal presentation such as spleen and liver may occur. In most cases it is asymptomatic but may present general symptoms, abdominal pain or fever. Immunohistochemistry is essential to make a definitive diagnosis. Forty year-old woman, with submaxillary lesion, in the neck, right fronto-parieto-occipital region with dry oral mucosa. It was initially managed as a Sjögren’s syndrome ruled out by the histopathological result of salivary gland biopsy. Subsequently, a neck ganglion biopsy was performed that reported follicular dendritic cell sarcoma, with positive immunohistochemical expression for CD23 and negative for CD21 and LCA. It was managed with samarium with a survival of 3 months from the time of its diagnosis. Follicular dendritic cell sarcoma is rare and its global survival is short.

[Diagnostic yield of fine-needle aspiration cytology for the detection of thyroid cancer in pediatric patients].

Despite the low frequency of thyroid nodules (TN) in children, one of every four is malignant. Fine-needle aspiration cytology (FNAC) has a high accuracy detecting thyroid cancer. To evaluate the performance of FNAC in TN in Chilean children to detect thyroid cancer. The pathological reports of 77 thyroidectomies and 103 FNAC carried out in patients aged less than 18 years, between 2002 and 2013 were reviewed. In 36 patients aged 15 ± 2 years (77% women), both the reports of the thyroidectomy and FNAC were available. The cytological specimens were reclassified based on Bethesda 2010. The histology was classified as benign (nodular hyperplasia and follicular adenoma, n = 18), or malignant (papillary, follicular and medullar carcinoma, n = 18). The concordance of the cytology with the final biopsy report was calculated. FNAC classified 13 specimens as definitively benign and 13 as definitively malignant. Among these, these concordances with the pathological study of the biopsy was 100%. Of six cytology tests considered "suspicious for follicular neoplasm" by FNAC, four were benign (67%), and two malignant (33%). Of four cytology tests considered "suggestive of carcinoma" by FNAC, one was benign (25%), and three malignant (75%). Among the studied children, there was a good concordance between FNAC and surgical biopsies. Therefore a FNAC should be carried out when malignancy is suspected in pediatric patients with a TN.

David Velázquez Fernández

Publications Biopsia de hígado por aspiración con aguja fina (1994) Características clínicas y evolución de la hipercalcemia grave por hiperparatiroidismo primario en pacientes intervenidos quirúrgicamente (2000) Accuracy of centinel node in papillary thyroid carcinoma (2001) Quality of life in bariatric surgery (2002) Utilidad de la laparoscopía con ultrasonido en la evaluación de resecabilidad de los tumores pancreáticos y ampulares. (2003) Laparoscopic approach to fever of unknown origin. (2003) Correlation between radiologic and pathologic dimensions of adrenal masses. (2004) Expression Profiling of Adrenocortical Tumors Suggests a Molecular Signature of Malignancy. (2005) Differential RNA expresión profile by cDNA microarray in sporadic primary hyperparathyroidism (PHPT):primary parathyroid hyperplasia versus adenoma. (2006)

Canine Demodicosis: A Re-examination of the Histopathologic Lesions and Description of the Immunophenotype of Infiltrating Cells.

Résumé- Cette étude décrit les modelités réactionnelles inflammatoires et l'immunophénotype des lésions histologiques de démodécie canine. Trois modalités principales sont décrites: une folliculite pariétale, une folliculite suppurative et furonculose, et une dermatite modulaire. La folliculite pariétale, réaction inflammatoire ciblée sur la paroi folliculaire, est présente dans tous les cas et constitue la modalité réactionnelle principale dans 17 cas sur 34 (50 pour cent). Le sous-type interface, caractérisé par une dégénérescence hydropique ou une apoptose des kératinocytes folliculaires, avec exocytose lymphocytaire, s'observe dans 15 de ces 17 cas. Une mélanose folliculaire et/ou une incontinence pigmentaire sont présentes sur 10 de ces 17 biopsies. Une dermatite nodulaire, représentée par un granulome périfolliculaire, est présente sur neur biopsies (26 pour cent). Une folliculite suppurative ou une furonculose est la modalité relationnelle dominante dans huit cas (24 pour cent). Tous les lymphocytes dans la paroi folliculaire sont des lymphocytes T CD3+, contre 10 pour cent sculement des cellules périfolluculaires. Les plasmocytes IgG+ constituent jusqu'à 74 pour cent des cellules périfolliculaires, et le pourcentage est encore plus élevé dans les cas de furonculose. Ces faits montrent que la folliculite pariétale est une lésion importante dans la démodécie canine, et suggère qu'une réaction à médiation cellulaire est dirigée spécifiquement contre la paroi folliculaire. [Canine demodicosis: a re-examination of the histopathologic lesions and description of the immunophenotype of infiltrating cells (La démodécie canine: réexamen des lésions histologiques et description de l'inmunophénotype des cellules infiltrantes). Resumen- Este estudio describe los patrones inflamatorios y el immunofenotipo de las lesiones histológicas en la demodicosis canina. Se identificaron tres patrones principales: foliculitis mural, foliculitis y furunculosis supurative, y dermatitis nodular. La foliculitis mural, una reacción inflatatoria dirigida a la pared folicular, se observó en todos los casos y constituia el patrón principal en 17 de los 34 casos (50%). En 15 de estos 17 casos la foliculitis mural era de tipo interfase, caracterizada por degeneración hidrópica o apoptosis de queratinocitos foliculares y exocitosis linfocitica. Se detectó melanosis folicular y/o incontinecia pigmentaria en 10 de estas 17 biopsias. Neuve biopsias (26 por ciento) presentaban dermatitis nodular, caracterizada por granulomas perifoliculares. Ocho casos (24 por ciento) mostraban foliculitis o furunculosis como patrón dominante. Linfocitos T CD3+ constituian la totalidad del infiltrado en la pared folicular, mientras que el mismo tipo celular representaban el 10 por ciento del infiltrado inflamatorio perifolicular. Hasta el 74 por ciento de las células perifoliculares eran células plasmáticas IgG+, con el mayor número en casos con furunculosis. Estos hallaz os indican que la foliculitis mural es una lesion importante la demodicosis canina y sugiere que una reacción mediada por células es dirigida a la pared folicular. [Canine demodicosis: a re-examination of the histopathological lesions and description of the immunophenotype of infiltrating cells (Demodicosis canina: repaso de las lesiones histopatológicas y descripción del inmunofenotipo del infiltrado celular). Abstract- This study describes the inflammatory patterns and immunophenotype of the histologic lesions of canine demodicosis. Three major patterns were identified: mural folliculitis, suppurative folliculitis and furunculosis and nodular dermatitis. Mural folliculitis, an inflammatory reaction targeting the follicular wall, was seen in all cases and was the principle pattern in 17 of 34 cases (50 per cent). The interface subtype of mural folliculitis, typified by hydropic degeneration or apoptosis of follicular keratinocytes and lymphocytic exocytosis, occurred in 15 of these 17 cases. Follicular melanosis and/or pigmentary incontinence occurred in 10 of these 17 biopsies. Nodular dermatitis, represented by perifollicular granulomas, was present in nine biopsies (26 per cent). Suppurative folliculitis or furunculosis was the dominant pattern in eight cases (24 per cent). All lymphocytes within the follicular wall were CD3+ T lymphocytes, compared to 10 per cent of the perifollicular cells. IgG+ plasma cells accounted for up to 74 per cent of perifollicular cells, highest in cases with furunculosis. These findings indicate that mural folliculitis is an important lesion of canine demodicosis, and suggests that a cell-mediated reaction is targeting the follicular wall.

[Diagnosis of differentiated thyroid cancers].

Thyroid nodule is a frequent clinical problem. Since the majority of these are benign, it is important to identify the cancers among them and at the same time avoid surgery in most. Fine needle aspiration biopsy is a direct method, reliable and without risk. Today this technique constitute the first step in evaluation of a thyroid nodule. If done properly, it will have a false negative rate of 1 to 2%. In few cases the diagnosis will remain uncertain even after the needle biopsy. In these cases thyroid scan and clinical criteria will be helpful to reach a therapeutic decision.

Patterns of Care and Comparison of Outcomes Between Primary Anal Squamous Cell Carcinoma and Anal Adenocarcinoma.

The management of adenocarcinoma of the anus can be challenging because there are few data on outcomes and trends in its treatment to date. This study aimed to compare and analyze the patterns of care and survival outcomes of patients with anal squamous cell carcinoma and anal adenocarcinoma. This was a retrospective study. This study was performed by utilizing the National Cancer Database. We selected a total of 19,539 patients between 2004 and 2014 with stage II to III squamous cell carcinoma or adenocarcinoma of the anus. The treatment groups analyzed were surgery alone, neoadjuvant chemoradiation followed by surgery, surgery followed by adjuvant chemoradiation, or definitive chemoradiation. Patient- and clinical-related factors were compared between the 2 groups. Kaplan-Meier and Cox proportional hazards regression models were used to assess overall survival. Of the patients studied, 18,346 (93.9%) had primary squamous cell carcinoma and 1193 (6.1%) had primary adenocarcinoma of the anus. The 5-year overall survival for stage II squamous cell carcinoma was 69.2%, and, for stage II adenocarcinoma, 5-year overall survival was 54.2% (p < 0.001). The 5-year overall survival for stage III squamous cell carcinoma was 55.2%, and, for stage III adenocarcinoma, 5-year overall survival was 32.9% (p < 0.001). On multivariable Cox regression, treatment with chemoradiation alone (HR, 0.67; p = 0.008) was associated with improved survival in squamous cell carcinoma. For the adenocarcinoma group, stage III disease (HR, 2.26; p < 0.001) and high tumor grade (HR, 1.59; p < 0.011) had a negative impact on survival, but there were no differences in survival based on the type of treatment received. The National Cancer Database does not include information on specific chemotherapeutic or immunotherapy agents given to patients, nor does it provide the exact cause of death. Anal adenocarcinoma in comparison to anal squamous cell carcinoma had a lower 5-year overall survival stage for stage. Anal adenocarcinoma appears to be treated similarly to the rectal cancer paradigm, with frequent use of neoadjuvant chemoradiation. See Video Abstract at http://links.lww.com/DCR/B50. PATRONES DE EL CUIDADO Y COMPARACIÓN DE RESULTADOS ENTRE EL CARCINOMA DE CÉLULAS ESCAMOSAS ANAL PRIMARIO Y EL ADENOCARCINOMA ANAL: El tratamiento del adenocarcinoma del ano puede ser un desafío ya que hasta la fecha, hay pocos datos sobre los resultados y las tendencias en su tratamiento.Comparar y analizar los patrones de el cuidado y resultados de supervivencia de pacientes con carcinoma anal de células escamosas y adenocarcinoma anal.Este fue un estudio retrospectivo.Este estudio se realizó utilizando la Base de Datos Nacional de Cancer (National Cancer Database, NCB).Seleccionamos un total de 19,539 pacientes entre el 2004-2014 con carcinoma de células escamosas en estadio II-III o adenocarcinoma del ano.Los grupos de tratamiento analizados fueron solo cirugía, quimiorradiación neoadyuvante seguida por cirugía, cirugía seguida por quimiorradiación adyuvante o quimiorradiación definitiva.Se compararon los factores clínicos y de pacientes entre los dos grupos. Se utilizaron modelos de regresión de riesgos proporcionales de Kaplan-Meier y Cox para evaluar la supervivencia general.18,346 (93.9%) tenían carcinoma primario de células escamosas y 1,193 (6.1%) tenían adenocarcinoma primario del ano. La supervivencia global a 5 años para el carcinoma de células escamosas en estadio II fue del 69.2% y para el adenocarcinoma en estadio II fue del 54.2% (p < 0.001). La supervivencia global a cinco años para el carcinoma de células escamosas en estadio III fue del 55.2% y para el adenocarcinoma en estadio III fue del 32.9% (p < 0.001). En la regresión de Cox multivariable, el tratamiento con quimiorradiación sola (proporción de riesgo 0.67, p = 0.008) se asoció con una mejor supervivencia en el carcinoma de células escamosas. Para el grupo de adenocarcinoma, la enfermedad en estadio III (proporción de riesgo 2.26, p < 0.001) y el alto grado tumoral (proporción de riesgo 1.59, p < 0.011) tuvieron un impacto negativo en la supervivencia, pero no hubo diferencias en la supervivencia según el tipo de tratamiento recibido.La Base de Datos Nacional de Cancer no incluye información sobre agentes quimioterapéuticos o de inmunoterapia específicos que se administran a los pacientes, ni proporciona la causa exacta de la muerte.El adenocarcinoma anal en comparación con el carcinoma anal de células escamosas tuvo una supervivencia general inferior a 5 años, etapa por etapa. El adenocarcinoma anal parece tratarse de manera similar al paradigma del cáncer rectal, con el uso frecuente de quimiorradiación neoadyuvante. Vea el video del resumen en http://links.lww.com/DCR/B50.

[Results of a cytological study of needle aspiration in 85 cases of nodular pathology of the thyroid gland, surgically controlled].

The present retrospective study is related to 85 patients with nodular thyroid pathology submitted to surgical therapy. In these patients preoperative cytology, through fine needle biopsy aspiration (FNBA), has been compared with histological examination performed on the surgical specimen. Malignant lesions were detected in 30 cases (35.3%). True positives cases were 14, true negative 48, false positive and false negative (FN) were 2 and 3 respectively. Due to the high number of FN, sensibility of FNBA was only 51.8%, specificity was 96% and accuracy 80.5%. Positive and negative predictive value were 87.5% and 78.6% respectively. Evaluation of the several sources of error comes to a conclusion that FNBA is certainly the main diagnostic tool in nodular thyroid pathology. Its employment should undergo to a centralized diagnostic evaluation in such a way that cytology is analysed together with clinical and other instrumental data.

[Metástasis en el lóbulo frontal como primera manifestación clínica de un carcinoma folicular de tiroides].

El carcinoma folicular de tiroides puede producir metástasis a distancia, siendo las localizaciones más habituales el pulmón y el hueso. Las metástasis cerebrales son inusuales, y es poco habitual que aparezcan como primera manifestación de cáncer. Paciente varón de 80 años, que tras una caída al suelo comenzó con alteración del comportamiento, desorientación y pérdida del control de esfínteres. La tomografía computarizada cerebral evidenció una masa en el lóbulo frontal derecho. Se realizó la extirpación de la lesión cerebral, cuyo estudio histológico informó de metástasis de carcinoma folicular de tiroides. La manifestación de la enfermedad con metástasis cerebrales es muy infrecuente, y empeora el pronóstico notablemente. Follicular thyroid carcinoma can produce distant metastases, generally occur to lung followed by bone. Brain metastases are unusual, and onset manifestation is little frequently. A 80-years old men presented disturbance behavior, desorientation and loss of sphincters after fallin to the ground. Computed tomography scan showed a lesion in the right frontal lobe. The patient underwent a craniotomy to remove the brain tumor, histopathology confirmed of follicular thyroid carcinoma metastases. At initial diagnosis brain metastasis are extremely rare, with adverse prognosis.

[Clinical significance of Hürthle cell in the cytology of thyroid disease].

The natural history of Hürthle cell (HC) lesions has been the focus of a considerable debate. The difficulties in defining the malignant potential of HC has led to the current designation of HC tumor, with the implication that it may behave as either a benign or a malignant lesion. The objective of our study was to verify the clinical and prognostic relevance of the cytological diagnosis of HC in the thyroid lesion, 10,950 consecutive patients (F/M = 5.6/1) with thyroid nodules were evaluated by means of fine needle aspiration biopsy (FNAB). Cytological diagnosis showed the presence of HC in 285 cases (2.6%), with a F/M ratio of 8.2/1. In 123 cases (43.2%) cytologic diagnosis resulted benign. A suspicious pattern of follicular neoplasm was observed in 159 cases (55.8%). Only in 3 cases (1%) thyroid carcinomas were preoperatively identified. No false positive or negative cases were observed. Among the HC lesions, 85 patients (29.8%) underwent thyroid surgery because of a malignant or suspicious cytologic diagnosis, continuous nodular growth despite LT4 therapy, mechanical compression or clinical judgement. The other two hundred patients were clinically evaluated and, one year later, repeated FNAB confirmed the cytologic diagnosis of benignity. Among the follicular neoplasm nodules, 80 cases (55.3%) were surgically explored, and thyroid carcinoma diagnosed in 30 of them (37.5%), this percentage being greater than that observed in the group of non-HC follicular neoplasm (17%). Pathologic criteria for malignancy (vascular invasion, transcapsular penetration, destructive capsular invasion) were described in 25 out of all carcinomas.

Nonmicroradical Resection Margin as a Predictor of Recurrence in Patients With Stage III Colon Cancer Undergoing Complete Mesocolic Excision: A Prospective Cohort Study.

The prognostic value of the present definition of microradicality in colon cancer is poorly understood, especially considering the vast influence it has in rectal cancer prognosis. This study aimed to investigate whether the risk of recurrence after complete mesocolic excision for stage III colon cancer is associated with the distance from tumor tissue to resection margin and whether the location of the involved margin is of any significance. A prospective cohort of patients was stratified into 2 groups to distinguish between direct margin invasion (0-mm resection margin) and a ≤1-mm resection margin without direct invasion or 3 groups to distinguish between the location of margin involvement (lateral tumor resection margin, central vascular ligation margin, and nonperitonealized mesocolic resection margin). Patients with microradical resections were used as a control group. We included all patients undergoing elective complete mesocolic excision for International Union Against Cancer stage III colon cancer at Nordsjællands Hospital between January 1, 2008, and December 31, 2016. A total of 276 patients met all inclusion criteria and none of the exclusion criteria. Primary outcome was risk of recurrence after 3.2 years. A total of 41 patients (15%) had a nonmicroradical resection. The 3.2-year cumulative incidence of recurrence for a 0-mm margin was 43% and 24% for a ≤1-mm margin without direct invasion, corresponding with an HR of 4.3 (p = 0.0146) and 1.3 (p = 0.474). The location of the involved margin showed no significant differences. This was a single-center study containing a limited number of patients with a nonmicroradical resection with a risk of type II error. We found no increased risk of recurrence for a ≤1-mm margin without direct invasion, indicating that the present classification of microradicality might not be justified if an intact posterior mesocolic fascia without invasion of tumor tissue is present. See Video Abstract at http://links.lww.com/DCR/B625. ANTECEDENTES:El valor pronóstico de la definición actual de microrradicalidad en el cáncer de colon es poco conocido, especialmente considerando la gran influencia que tiene en el pronóstico del cáncer de recto.OBJETIVO:Este estudio tiene como objetivo investigar si el riesgo de recurrencia después de la escisión mesocólica completa (CME) para el cáncer de colon en estadio III está asociado con la distancia desde el tejido tumoral hasta el margen de resección y si la localización del margen afectado tiene alguna importancia.DISEÑO:Una cohorte prospectiva de pacientes se estratificó en dos grupos para distinguir entre la invasión del margen directo (margen de resección de 0 mm) y un margen de resección ≤1 mm sin invasión directa, o tres grupos para distinguir entre la localización de la afectación del margen (resección lateral del margen del tumor, margen de ligadura vascular central y margen de resección mesocólica no peritonizada). Los pacientes con resecciones microrradicales se utilizaron como grupo control.ENTORNO CLÍNICO:Incluimos a todos los pacientes sometidos a CME electiva por cáncer de colon en estadio III de la UICC en el Hospital Nordsjællands, Dinamarca, entre el 1 de enero de 2008 y el 31 de diciembre de 2016.PACIENTES:Un total de 276 pacientes cumplieron todos los criterios de inclusión y ninguno de los criterios de exclusión.PRINCIPALES MEDIDAS DE RESULTADO:El resultado primario fue el riesgo de recurrencia después de 3 · 2 años.RESULTADOS:Un total de 41 (15%) pacientes tuvieron una resección no microrradical. La incidencia acumulada de recurrencia a los 3,2 años para un margen de 0 mm fue del 43% y del 24% para un margen ≤1 mm sin invasión directa, lo que corresponde a un cociente de riesgo de 4,3 (p = 0,0146) y 1,3 (p = 0,474) respectivamente. La localización del margen afectado no mostró diferencias significativas.LIMITACIONES:Estudio unicéntrico con un número limitado de pacientes con resección no microrradical con riesgo de error tipo II.CONCLUSIONES:No encontramos un mayor riesgo de recurrencia para un margen ≤1 mm sin invasión directa, lo que indica que la clasificación actual de microrradicalidad podría no estar justificada si está presente una fascia mesocólica posterior intacta sin invasión del tejido tumoral. Consulte Video Resumen en http://links.lww.com/DCR/B625. (Traducción-Dr Yazmin Berrones-Medina).

[Cytodiagnosis by fine-needle aspiration (FNAB) in thyroid dysplasias and neoplasms observed in 1983-1987].

Cytology using fine needle aspiration biopsy has been widely used in dysplastic and neoplastic thyroid lesions as it is free of complications and very accurate. Personal experience with 2212 thyroid fine needle aspiration biopsies (1564 patients) performed in the period 1983-1987 is reported. Cytologic and histologic diagnoses are compared with respect to 139 patients. Diagnostic accuracy was 85.61%, with 9 false negatives (6.45%) and 11 false positives (7.51%). Sensitivity was higher in papillary thyroid carcinomas and Hürthle cell neoplasias than in follicular neoplasias and nodular goitres (89.66% and 90% versus 79.47% and 87.03% respectively). The false positives observed in follicular neoplasias depend on the limitations of cytologic and histologic analyses. Fine needle aspiration biopsy makes it possible to select candidates for thyroidectomy although in some cases surgical exploration is required for diagnosis.

Differential Expression of PEG10 Contributes to Aggressive Disease in Early Versus Late-Onset Colorectal Cancer.

Colorectal cancer is a leading cause of cancer-related death. Early onset colorectal cancer (age ≤45 y) is increasing and associated with advanced disease. Although distinct molecular subtypes of colorectal cancer have been characterized, it is unclear whether age-related molecular differences exist. We sought to identify differences in gene expression between early and late-onset (age ≥65 y) colorectal cancer. We performed a review of our institution's colorectal cancer registry and identified patients with colorectal cancer with tissue specimens available for analysis. We used the Cancer Genome Atlas to initially identify differences in gene expression between early and late-onset colorectal cancer. In vitro experiments were performed on 2 colorectal cancer cell lines. The study was conducted at a tertiary medical center. Patients with early onset (n = 28) or late onset (age ≥65 y; n = 38) at time of diagnosis were included. The primary outcome was differential gene expression in patients with early versus late-onset colorectal cancer. The secondary outcome was patient mortality. Seven genes had increased expression in younger patients using The Cancer Genome Atlas. Only PEG10 was sufficiently expressed with quantitative polymerase chain reaction and had increased expression in our early onset group. Multivariable linear regression analysis identified age as a significant independent predictor of increased PEG10 expression. Outcomes data from The Cancer Genome Atlas suggests that PEG10 is associated with poor overall survival. In vitro studies in HCT-116 and HT-29 cell lines showed that PEG10 contributes to cellular proliferation and invasion in colorectal cancer. Tissue samples were from formalin-fixed, paraffin-embedded sections. Many patients did not have mutational status for review. PEG10 is differentially expressed in early onset colorectal cancer and may functionally contribute to tumor cell proliferation and invasion. An increase in PEG10 expression correlates with decreased overall survival. See Video Abstract at http://links.lww.com/DCR/B343. LA EXPRESIÓN DIFERENCIAL DE PEG10 CONTRIBUYE A LA ENFERMEDAD AGRESIVA EN EL CÁNCER COLORRECTAL DE INICIO TEMPRANO VERSUS INICIO TARDÍO: El cáncer colorrectal es una de las principales causas de muerte relacionada con el cáncer. El cáncer colorrectal de inicio temprano (edad ≤45 años) está en aumento y asociado con enfermedad avanzada. Aunque se han caracterizado distintos subtipos moleculares del cáncer colorrectal, no está claro si existen diferencias moleculares relacionadas con la edad.Se buscó identificar diferencias en la expresión génica entre el cáncer colorrectal de inicio temprano y tardío (edad ≥ 65 años).Realizamos una revisión del registro de cáncer colorrectal de nuestra institución e identificamos pacientes con cáncer colorrectal con muestras de tejido disponibles para su análisis. Utilizamos el Atlas del Genoma del Cáncer para identificar inicialmente las diferencias en la expresión génica entre el cáncer colorrectal de inicio temprano y de inicio tardío. Se realizaron experimentos in vitro en dos líneas celulares de cáncer colorrectal.El estudio se realizó en un centro médico de tercer nivel.Se incluyeron pacientes con inicio temprano (n = 28) e inicio tardío (edad ≥65 años, n = 38) al momento del diagnóstico.El resultado primario fue la expresión diferencial de genes en pacientes con cáncer colorrectal de inicio temprano versus tardío. El resultado secundario fue la mortalidad de los pacientes.Siete genes aumentaron su expresión en pacientes más jóvenes usando el Atlas del Genoma del Cáncer. Solo PEG10 se expresó suficientemente con la reacción en cadena de la polimerasa cuantitativa y tuvo una mayor expresión en nuestro grupo de inicio temprano. El análisis de regresión lineal multivariable identificó la edad como un predictor independiente significativo del aumento de la expresión de PEG10. Los datos de resultados de el Atlas del Genoma del Cáncer sugieren que PEG10 está asociado con una pobre supervivencia general. Los estudios in vitro en líneas celulares HCT-116 y HT-29 mostraron que PEG10 contribuye a la proliferación e invasión celular en el cáncer colorrectal.Las muestras de tejido fueron de portaobjetos embebidos en parafina fijados con formalina. Muchos pacientes no tenían el estado de mutación para su revisión.El PEG10 se expresa diferencialmente en el cáncer colorrectal de inicio temprano y puede contribuir funcionalmente a la proliferación e invasión de células tumorales. El aumento en la expresión de PEG10 se correlaciona con la disminución de la supervivencia general. Consulte Video Resumen en http://links.lww.com/DCR/B343.

[Verifiable diagnosis of the puncture of the fine needle aspiration in head and neck neoplasms].

We have studied 103 fine needle aspiration (FNA) biopsies as diagnostic technique on patients with head and neck tumours: 55 FNA on thyroid gland, 35 in cervical lymph nodes and 13 on salivary glands. The results obtained by PAAF were coincident in 90.8% of the cases with histology and clinical evolution of the patient. Specificity was of 98%, sensibility to detect the tumour presence 84%, with a positive predictive value of 95%. No complications were found in any of the patients. We conclude that PAAF is an excellent first line method for diagnostic investigation of palpable masses in head and neck, and allows us to reduced the number of surgical manoeuvres.

MRI at Restaging After Neoadjuvant Therapy for Rectal Cancer Overestimates Circumferential Resection Margin Proximity as Determined by Comparison With Whole-Mount Pathology.

Current guidelines recommend restaging with MRI after neoadjuvant therapy for rectal cancer, but the accuracy of restaging MRI in estimating circumferential margin involvement requires additional clarification. The objective of this study was to measure the accuracy of circumferential resection margin assessment by MRI after neoadjuvant therapy and identify characteristics associated with accuracy. MRI data were retrospectively analyzed for concordance with the findings of whole-mount pathology analysis of the corresponding surgical specimens. Univariate and multivariate logistic regression analyses were performed to identify characteristics associated with accuracy. This study was conducted at a comprehensive cancer center. Included in the study were consecutive patients who underwent total mesorectal excision for rectal cancer between January 2018 and March 2020 after receiving neoadjuvant therapy and undergoing restaging with MRI. The primary outcome of this study included accuracy, sensitivity, specificity, and positive and negative predictive values for categorizing the circumferential resection margin as threatened; mean and paired mean differences were in proximity of the margin. Of the 94 patients included in the analysis, 39 (41%) had a threatened circumferential resection margin according to MRI at restaging, but only 17 (18%) had a threatened margin based on pathology. The accuracy of MRI in identifying a threatened margin was 63.8%, with margin proximity overestimated by 0.4 cm on average. In multivariate logistic regression, anterior location of the margin and tumor proximity to the anal verge were independently associated with reduced MRI accuracy. A limitation was the retrospective design at a single institution. The knowledge that MRI-based restaging after neoadjuvant therapy overestimates circumferential margin proximity may render some surgical radicality unnecessary and thereby help avoid the associated morbidity. With the recognition that MRI-based assessment of margin proximity may not be reliable for anterior margin and for distal tumors, radiologists may want to use greater caution in interpreting images of tumors with these characteristics and to acknowledge the uncertainty in their reports. See Video Abstract at http://links.lww.com/DCR/B814. ANTECEDENTES:Las pautas actuales recomiendan la re-estadificación por medio de la resonancia magnética luego de terapia neoadyuvante en los casos de cáncer de recto, pero la precisión de la reevaluación con la IRM para estimar el grado de implicación del margen circunferencial requiere aclaraciones adicionales.OBJETIVO:Medir el grado de exactitud en la evaluación del margen de resección circunferencial mediante resonancia magnética después de la terapia neoadyuvante e identificar las características asociadas con la precisión.DISEÑO:Se analizaron retrospectivamente los datos de resonancia magnética para determinar la concordancia entre los hallazgos del análisis de la pieza de anatamopatología y las muestras quirúrgicas correspondientes. Se realizó el análisis de regresión logística univariada y multivariada para identificar las características asociadas con la exactitud.AJUSTE:Centro oncológico integral.PACIENTES:Todos aquellos que se sometieron consecutivamente a una excisión total del mesorrecto por cáncer rectal entre Enero 2018 y Febrero 2020 luego de recibir terapia neoadyuvante y someterse a una re-estadificación por imágenes de resonancia magnética (IRM).PRINCIPALES MEDIDAS DE RESULTADO:La exactitud, la sensibilidad y especificidad; los valores predictivos positivos y negativos para categorizar el margen de resección circunferencial como amenazado; la diferencia media y las medias pareadas de proximidad a los margenes.RESULTADOS:De los 94 pacientes incluidos en el análisis, 39 (41%) tenían un margen de resección circunferencial amenazado según la resonancia magnética en la re-estadificación, pero solo 17 (18%) tenían un margen amenazado basado en la patología. La precisión de la resonancia magnética para identificar un margen amenazado fue del 63,8%, con la proximidad del margen sobreestimada en 0,4 cm en promedio. En la regresión logística multivariada, la ubicación anterior de los bordes de resección y la proximidad del tumor al margen anal se asociaron de forma independiente con la reducción en la precisión de la resonancia magnética.LIMITACIONES:Diseño retrospectivo en una institución única.CONCLUSIONES:El saber que la re-estadificación basada en la IRM, luego de terapia neoadyuvante sobreestima la proximidad de la lesión a los márgenes circunferenciales, hace innecesaria cierta radicalidad quirúrgica complementaria, lo que ayuda a evitar morbilidad asociada. Reconociendo que la evaluación de proximidad de los márgenes de resección basada en la resonancia magnética, no puede ser confiable en casos de márgenes anteriores y en casos de tumores distales. Los radiólogos recomiendan tener más precaución en la interpretación de imágenes de tumores con estas características y reconocen cierto desasosiego en sus informes. Consulte Video Resumen en http://links.lww.com/DCR/B814.

[Utility of frozen section in the surgical treatment of thyroid nodules].

To present our experience of the use of frozen section (FS) in the operative management of thyroid nodules and determine the utility of this procedure when deciding the extent of thyroidectomy. We performed a prospective and comparative study. The FS of patients who underwent surgery for thyroid nodules between 1995 and 2002 were evaluated. The results were compared with those of fine-needle aspiration cytology (FNA) and definitive biopsy. The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and diagnostic accuracy of both FNA and FS were calculated. There were 469 thyroidectomies and 179 FS were performed. The results obtained for FNA and FS were, respectively: PPV: 100%/100%; NPV: 89%/90%; diagnostic accuracy: 89.5%/91%. When only "follicular hyperplasia" was included as the cytologic diagnosis, the PPV and NPV for FS were 100% and 86.7%, respectively. The diagnostic accuracy of FNAC and FS is similar. In cases of follicular hyperplasia, the sensitivity of FS is too low to rule out malignancy.

Assessing the Reliability and Positive Predictive Value of p16 as a Surrogate for Human Papillomavirus-Mediated E6/7 mRNA Expression in Squamous Cell Carcinoma of the Anal Canal.

Human papillomavirus has been implicated in the carcinogenesis of squamous cell carcinoma of the anal canal. p16 expression and the presence of human papillomavirus DNA have been used to define human papillomavirus-positive patients, but neither approach has been validated against the standard of human papillomavirus E6/7 mRNA expression at this disease site. This study aimed to evaluate the acceptability of p16 immunohistochemistry as a surrogate to E6/7 mRNA expression in identifying human papillomavirus-mediated squamous cell carcinoma of the anal canal. This was a retrospective analysis of a previously constructed tissue microarray. This study was conducted at a tertiary academic center. Biopsies and resection specimens from patients diagnosed with squamous cell carcinoma of the anal canal at the study institution from 2005 to 2015 were reviewed for sample adequacy. Concordance between p16 positivity by immunohistochemistry and E6/7 mRNA expression by in situ hybridization was evaluated. Sensitivity, specificity, and positive predictive value were assessed. Among the 25 patients evaluated, p16 and E6/7 mRNA results were concordant in 24 of 25 specimens (96%). Of the 24 concordant samples, there were 23 true positives (p16+ and E6/7+) and 1 true negative (p16- and E6/7-). One specimen was discordant (p16- and E6/7+) between p16 and E6/7 mRNA (4%). This resulted in a sensitivity of 96% and a specificity of 100%. Positive predictive value of p16 immunohistochemistry for E6/7 mRNA expression was 100%. This study was limited by its retrospective nature and small sample size. It only assessed diagnostic parameters rather than prognostic implications. In this study, the clinically prevalent method of p16 immunohistochemistry showed excellent concordance with the standard of E6/7 mRNA expression and demonstrated its potential to serve as a surrogate for identifying human papillomavirus-induced squamous cell carcinoma of the anal canal. See Video Abstract at http://links.lww.com/DCR/B448. ANTECEDENTES:El virus del papiloma humano se ha relacionado en la carcinogénesis del carcinoma de células escamosas del canal anal. La expresión de p16 y la presencia de ADN del virus del papiloma humano, se han utilizado para definir a los pacientes positivos al virus del papiloma humano. Pero ninguno de estos enfoques, han sido validados frente al estándar de oro de la expresión del ARNm del virus del papiloma humano E6 / 7, en este sitio de la enfermedad.OBJETIVO:El estudio tuvo como objetivo, evaluar la aceptabilidad de la inmunohistoquímica del p16, como sustituto de la expresión de ARNm de E6 / 7, en la identificación del carcinoma de células escamosas del canal anal, mediada por virus del papiloma humano.DISEÑO:Fue un análisis retrospectivo de un microarreglo de tejido previamente construido.AJUSTE:El estudio se realizó en un centro académico terciario.PACIENTES:Se revisaron biopsias y muestras de resección de pacientes diagnosticados con carcinoma de células escamosas del canal anal, en la institución del estudio, entre 2005 y 2015 para determinar la idoneidad de la muestra.PRINCIPALES MEDIDAS DE RESULTADO:Se evaluó la concordancia entre la positividad de p16 por inmunohistoquímica y la expresión de ARNm de E6 / 7 por hibridación in situ. Se evaluaron la sensibilidad, especificidad y valor predictivo positivo.RESULTADOS:Entre los 25 pacientes evaluados, los resultados del ARNm de p16 y E6 / 7 fueron concordantes en 24/25 muestras (96%). De las 24 muestras concordantes, hubo 23 positivos verdaderos (p16 + y E6 / 7 +) y un negativo verdadero (p16- y E6 / 7-). Una muestra fue discordante (p16- y E6 / 7 +) entre p16 y ARNm de E6 / 7 (4%). Esto resultó en una sensibilidad del 96% y una especificidad del 100%. El valor predictivo positivo de la inmunohistoquímica de p16 para la expresión de ARNm de E6 / 7 fue del 100%.LIMITACIONES:El estudio estuvo limitado por su naturaleza retrospectiva y por el tamaño pequeño de la muestra. Solamente evaluó los parámetros de diagnóstico, en lugar de las implicaciones pronosticas.CONCLUSIONES:En este estudio, el método clínico prevalente de inmunohistoquímica p16, mostró una excelente concordancia con el estándar de oro de la expresión de ARNm de E6 / 7 y demostró su potencial para servir, como sustituto para identificar el carcinoma de células escamosas del canal anal, inducido por el virus del papiloma humano. Consulte Video Resumen en http://links.lww.com/DCR/B448.

[The utility of aspiration cytology for the distinction of aggressive and non-aggressive papillary carcinoma of the thyroid].

Preoperative identification of the aggressive variants of papillary thyroid carcinoma (PTC) by fine needle aspiration (FNAC) has been suggested and different systems for distinguishing them from classical variant of PTC have been employed, including a point-based cytology grading system as suggested by Damiani et al., that we currently use in our Institution. The aim of this paper is to verify if distinction of PTC in aggressive or nonaggressive variants impacts on surgical treatment. In 7 years, from 1998 to 2005, 13586 cases of FNAC of thyroid have been performed; among them 156 PTC. The cytological material of thirty complete thyroidectomies with histology proven papillary thyroid carcinoma were reviewed. 11/30 cases were correctly stratified into the appropriate low or high-grade category. The cytological grading system was discordant with the final histopathological diagnosis in 9/30 cases while in 10 cases the grade was not assessed. Eight cases were downgraded and therefore the low grade papillary carcinoma diagnosed at cytological level turned to be high grade at histology. When those cases were reviewed, the histology of seven cases diagnosed as tall cell variant of PTC failed to show a percentage of tumour cells higher than 50% and therefore it would be better to diagnose them as classical variant of PTC. One case was under-graded at FNAC. The case that was cytologically upgraded was a follicular variant of PTC in Hashimoto thyroiditis with a focus of tall cells. All patients underwent thyroidectomy or thyroidectomy plus lymphadenectomy and from our results the pre-operative diagnosis did not effect the surgical treatment. No patient died of the disease.

Anal Squamous Cell Carcinoma in Ulcerative Colitis: Can Pouches Withstand Traditional Treatment Protocols?

Anal squamous cell carcinoma has rarely been reported in the setting of ulcerative colitis. This study aimed to understand the prognosis of anal squamous cell carcinoma in the setting of ulcerative colitis. This is a retrospective review. This study was conducted at a referral center. Adult patients with both ulcerative colitis (556.9/K51.9) and anal squamous cell carcinoma (154.3/C44.520) between January 1, 2000 and August 1, 2019 were included. The primary outcomes measured are treatment and survival of anal squamous cell carcinoma. Of the 13,499 patients with ulcerative colitis treated, 17 adult patients with ulcerative colitis and anal dysplasia and/or anal squamous cell carcinoma were included in the study: 6 had a diagnosis of anal squamous cell carcinoma, 8 had high-grade squamous intraepithelial lesions, and 3 had low-grade squamous intraepithelial lesions. There were 4 men (23%) and a median age of 55 years (range, 32-69) years. At diagnosis, 6 had an IPAA, of which 5 had active pouchitis, 1 had an ileorectal anastomosis with active proctitis, 1 had a Hartmann stump with disuse proctitis, 5 had pancolitis, and 4 had left-sided colitis. Of the 6 with anal squamous cell carcinoma, all received 5-fluorouracil and mitomycin C with external beam radiation therapy. Four patients had an IPAA, all of whom required intestinal diversion or pouch excision because of treatment intolerance. At a median follow-up of 60 months, 3 patients died: one at 0 months (treatment-related myocardial infarction), one at 60 months (metastatic anal squamous cell carcinoma), and one at 129 months (malignant peripheral nerve sheath tumor); the remaining patients had no residual disease. This study was limited because of its retrospective nature and small number of patients. Anal squamous cell carcinoma in the setting of ulcerative colitis is extremely rare. In the setting of IPAA, diversion may be necessary to prevent radiation intolerance. Careful examination of the perianal region should be performed at the time of surveillance endoscopy. See Video Abstract at http://links.lww.com/DCR/B582. ANTECEDENTES:La incidencia de cáncer anal de células escamosas es muy baja en pacientes con colitis ulcerosa.OBJETIVO:Comprender el pronóstico del cáncer anal de células escamosas en el contexto de la colitis ulcerosa.DISEÑO:Revisión retrospectiva.AJUSTE:Centro de referencia.PACIENTES:Pacientes adultos con colitis ulcerosa (556.9 / K51.9) y cáncer anal de células escamosas (154.3 / C44.520) entre el 1 de enero de 2000 y el 1 de agosto de 2019.RESULTADOS PRINCIPALES:Tratamiento y sobrevida del cáncer anal de células escamosas.RESULTADOS:De 13.499 pacientes en tratamiento por colitis ulcerosa, diecisiete presentaron displasia y/o cáncer de células escamosas: 6 con cáncer, 8 con lesiones intraepiteliales escamosas con displasia de alto grado y 3 con displasia de bajo grado.Cuatro son hombres (23 %) con una mediana de 55 años (rango 32-69). Al realizar el diagnóstico 6 tenían pouch, 5 con pouchitis activa; 1 con ileorecto anastomosis con proctitis activa y 1 con operación de Hartman y muñón con colitis por desuso; además 5 tenían pancolitis y 4 tenían colitis izquierdaTodos los casos con cáncer anal de células escamosas (6 pacientes), fueron tratados con 5-FU mas Mitomicina y radioterapia externa. Cuatro pacientes tenían pouch, todos requirieron derivación intestinal o escisión del pouch por intolerancia al tratamiento.En la mediana de seguimiento de 60 meses, tres pacientes fallecieron: uno a los 0 meses (infarto de miocardio relacionado con el tratamiento), uno a los 60 meses (cáncer de células escamosas metastásico) y uno a los 129 meses (tumor maligno de la vaina del nervio periférico); el resto no presentaba enfermedad residual.LIMITACIONES:Revisión retrospectiva, número pequeño de pacientes.CONCLUSIÓN:El cáncer anal de células escamosas en el contexto de la colitis ulcerosa es extremadamente raro. En el contexto de IPAA, la derivación puede ser necesaria para prevenir la intolerancia a la radiación. Se debe realizar un examen cuidadoso de la región perianal en el momento de la endoscopia de control. Consulte Video Resumen en http://links.lww.com/DCR/B582.

[Hürthle cells carcinoma. Report of two operated cases and review of the literature].

Hürthle cells carcinomas are considered a variant of folicular carcinomas and represent about 2% of all malignant thyroid tumours. We report 2 cases of 2 women of 46 and 43 years old confirmed by histological exam after total thyroidectomy with good postoperative evolution. The presence of capsular and vascular invasion is the most important criteria to distinguish this entity from the Hürthle cells adenomas.

Correlation Between the Distance to Mesorectal Fascia and Prognosis of cT3 Rectal Cancer: Results of a Multicenter Study From China.

The cT3 substage criteria based on extramural depth of tumor invasion in rectal cancer have several limitations. This study proposed that the distance between the deepest tumor invasion and mesorectal fascia on pretherapy MRI can distinguish the prognosis of patients with cT3 rectal cancer. This is a cohort study. This study included a prospective, single-center, observational cohort and a retrospective, multicenter, independent validation cohort. Patients who had cT3 rectal cancer with negative mesorectal fascia undergoing neoadjuvant chemoradiotherapy followed by radical surgery were included in 4 centers in China from January 2013 to September 2014. Baseline MRI with the distance between the deepest tumor invasion and mesorectal fascia, extramural depth of tumor invasion, and mesorectum thickness were measured. The cutoff of the distance between the deepest tumor invasion and mesorectal fascia was determined by time-dependent receiver operating characteristic curves, supported by a 5-year progression rate from the prospective cohort, and was then validated in a retrospective cohort. There were 124 and 274 patients included in the prospective and independent validation cohorts. The distance between the deepest tumor invasion and mesorectal fascia was the only predictor for cancer-specific death (HR, 0.1; 95% CI, 0.0-0.7) and was also a significant predictor for distant recurrence (HR, 0.4; 95% CI, 0.2-0.9). No statistically significant difference was observed in prognosis between patients classified as T3a/b and T3c/d. The sample size is relatively small, and the study focused on cT3 rectal cancers with a negative mesorectal fascia. A cutoff of 7 mm of the distance between the deepest tumor invasion and mesorectal fascia on baseline MRI can distinguish cT3 rectal cancer from a different prognosis. We recommend using the distance between the deepest tumor invasion and mesorectal fascia on baseline MRI for local and systemic risk assessment and providing a tailored schedule of neoadjuvant treatment. See Video Abstract at http://links.lww.com/DCR/B682.CORRELACIÓN ENTRE LA DISTANCIA DE LA FASCIA MESORRECTAL Y EL PRONÓSTICO DEL CÁNCER DE RECTO cT3: RESULTADOS DE UN ESTUDIO MULTICÉNTRICO DE CHINAANTECEDENTES:Los criterios de subestadificación cT3 basados en la profundidad extramural de invasión tumoral en el cáncer de recto tienen varias limitaciones.OBJETIVO:Este estudio propuso que la distancia entre la invasión tumoral más profunda y la fascia mesorrectal en la resonancia magnética preterapia puede distinguir el pronóstico de los pacientes con cT3.DISEÑO:Estudio de cohorte.ENTORNO CLINICO:El estudio incluyó una cohorte observacional, prospectiva, unicéntrica, y una cohorte de validación retrospectiva, multicéntrica e independiente.PACIENTE:Se incluyeron pacientes con cáncer de recto cT3 con fascia mesorrectal negativa sometidos a quimio-radioterapia neoadyuvante seguida de cirugía radical en cuatro centros de China desde enero de 2013 hasta septiembre de 2014.INTERVENCIÓN:Imágenes de resonancia magnética de referencia fueron medidas con la distancia entre la invasión tumoral más profunda y la fascia mesorrectal; la profundidad extramural de la invasión tumoral y el grosor del mesorrecto.PRINCIPALES MEDIDAS DE VALORACION:El límite de la distancia entre la invasión tumoral más profunda y la fascia mesorrectal se determinó mediante curvas características operativas del receptor dependientes del tiempo y se apoyó en la tasa de progresión a 5 años de la cohorte prospectiva, y luego se validó en una cohorte retrospectiva.RESULTADOS:Se incluyeron 124 y 274 pacientes en la cohorte de validación prospectiva e independiente, respectivamente. La distancia entre la invasión tumoral más profunda de la fascia mesorrectal fue el único predictor de muerte específica por cáncer (Hazard ratio: 0.1, 95% CI, 0,0-0,7); y también fue un predictor significativo de recurrencia distante Hazard ratio: 0,4, 95% CI, 0,2-0,9). No se observaron diferencias estadísticamente significativas en el pronóstico entre los pacientes clasificados como T3a/b y T3c/d.LIMITACIONES:El tamaño de la muestra es relativamente pequeño y el estudio se centró en los cánceres de recto cT3 con fascia mesorrectal negativa.CONCLUSIONES:Un límite de 7 mm de distancia entre la invasión tumoral más profunda y la fascia mesorrectal en la resonancia magnética de referencia puede distinguir el cáncer de recto cT3 de diferentes pronósticos. Recomendamos la distancia entre la invasión tumoral más profunda y la fascia mesorrectal en la resonancia magnética de referencia para la evaluación del riesgo local y sistémico, proporcionando un programa personalizado de tratamiento neoadyuvante. Consulte Video Resumen en http://links.lww.com/DCR/B682. (Traducción- Dr. Francisco M. Abarca-Rendon).

[Comparison between the diagnostic accuracy in diagnosis of thyroid nodules with fine needle biopsy an intraoperative histological evaluation of frozen tissue].

The aim of this study was to compare the diagnostic accuracy of fine needle biopsy (FNB) and intraoperative frozen-section biopsy (FS) regarding the surgical management of thyroid nodules. A total of 812 patients with solitary nodule or dominant nodule in a multinodular goiter were evaluated. The patients underwent preoperative FNB and intraoperative FS diagnosis. The definitive histological diagnosis (HD) was: i) 222 malignant lesions (118 papillary, 67 follicular, 16 anaplastic and 8 medullary cancers); ii) 590 benign lesions. FNB accuracy was 90.6%, sensitivity 96.8% and specificity 87.1%. FS accuracy was 97.4%, sensitivity 91.3% and specificity 100%. False negative (FN) were 10 for FNB and 21 for FS. False positive (FP) were 74 for FNB and 0 for FS. FS was less sensitive for the diagnosis of papillary cancer (more FN) and more specific for the diagnosis of follicular thyroid cancers (no FP). In conclusion, FS is useful in patients undergoing surgery for a thyroid nodule having a "suspicious" cytology. It adds no information in patients with an FNB diagnosis of malignancy and is of limited use in those in whom an FNB benign lesion is diagnosed.

ANTECEDENTES: El esófago de Barrett es una reconocida lesión precursora de adenocarcinoma esofágico. Aunque generalmente asociada al reflujo gastroesofágico, los mecanismos patogénicos de la enfermedad no son bien conocidos. El objetivo del presente estudio es explorar la historia natural e identificar marcadores de progreso del proceso precanceroso. MATERIAL Y M#ENTITYSTARTX000E9;TODOS: Se utilizaron cortes histológicos de 67 especímenes de esófago correspondientes a 14 pacientes con esófago de Barrett, a los que se siguió entre 1 - 9 años. Se clasificaron las lesiones en: esófago de Barrett sin displasia, indefinido para displasia o con displasia. Se evaluó la expresión de diferentes mucinas en las células caliciformes y en las columnares usando técnicas de histoquímica e inmunohistoquímica. RESULTADOS: En todos los casos se comprobó la presencia de metaplasia intestinal incompleta. Las células columnares dentro del epitelio metaplásico contenían mucinas neutras. A mayor severidad de la lesión se encontró significativamente menor expresión de sialomucinas en las células columnares (p de tendencia igual a 0,03). En sujetos con lesiones indefinidas para displasia se observó un mayor contenido de sulfomucinas en las células caliciformes (p=0,034) y de MUC2 en las células columnares (p=0,029) que en sujetos con esófago de Barrett sin displasia. Se observó expresión de la mucina intestinal MUC2 y de la mucina gástrica MUC5AC en todas las muestras. MUC6, una mucina de las glándulas profundas gástricas, se presentó ocasionalmente. CONCLUSI#ENTITYSTARTX000F3;N: La evaluación de los perfiles de mucinas en el esófago de Barrett sugiere una transición gradual del fenotipo del epitelio metaplásico a medida que la lesión avanza en el tiempo.

[Fine needle aspiration biopsy of thyroid nodules. Analysis of results obtained using a new method with histological examination of the sample].

Fine needle aspiration biopsy (FNAB) is the most useful preoperative work up method for patients with nodular goiter. We analyze 173 patients that underwent FNAB and were subsequently operated. The sample with FNAB was processed both for cytological and histological study, using methods developed at the hospital. The preoperative diagnosis reached was compared with that obtained with the surgical piece. Results showed that the histological analysis of the FNAB sample improved the sensitivity of the method, when compared with the cytological study, from 68.5% to 87.8% (p < 0.035) without modifying specificity (100% for both methods). It is concluded that FNAB with histological study of the sample has a high diagnostic yield and is exempt of complications.

Risk of Colorectal Cancer and Advanced Polyps One Year After Excision of High-Risk Adenomas.

Patients with multiple or large adenomas are considered to be high-risk for metachronous colorectal cancer. Evaluate the risks of detecting colorectal cancer, advanced adenoma, and advanced serrated polyps at 1-year surveillance colonoscopy in patients with >5 adenomas or adenomas >20 mm. Descriptive, retrospective, multicentric, cohort study. We calculated the absolute risk of developing colorectal cancer, advanced adenomas, and advanced serrated polyps at the 1-year surveillance colonoscopy. Potential risk factors for advanced neoplasia at follow-up were evaluated with univariable and multivariable logistic regression analyses. This study included data from a multicenter cohort colorectal cancer screening program, conducted from January 2014 to December 2015, based on fecal immunochemical tests in Spain. We included 2119 participants with at least 1 adenoma ≥20 mm or ≥5 adenomas of any size. We calculated the absolute risk of developing colorectal cancer, advanced adenomas, and advanced serrated polyps at the 1-year surveillance colonoscopy. Potential risk factors for advanced neoplasia at follow-up were evaluated with univariable and multivariable logistic regression analyses. At 1 year, participants displayed 6 colorectal cancers (0.3%), 228 advanced adenomas (10.5%), and 58 advanced serrated polyps (2.7%). The adjusted analysis identified 2 factors associated with advanced neoplasia: >5 adenomas (odds ratio 1.53; 95% CI: 1.15-2.03; p = 0.004) and polyps in a proximal location (OR 1.52; 95% CI: 1.15-2.02; p = 0.004). First, the sample size was relatively small compared to other studies with similar aims. Another limitation was the lack of a comparison group, which could have provided more practical results in terms of surveillance recommendations. The colorectal cancer detection rate at a 1-year colonoscopy surveillance was low among patients classified at high risk of advanced neoplasia. The risk factors for advanced neoplasia were ≥5 adenomas and proximal polyps at baseline. See Video Abstract at http://links.lww.com/DCR/B820 . ANTECEDENTES:Los pacientes con adenomas múltiples o grandes se consideran de alto riesgo para desarrollar cáncer colorrectal metacrónico.OBJETIVO:Evaluar los riesgos de detectar cáncer colorrectal, adenoma avanzado y pólipos serrados avanzados en la colonoscopia de seguimiento al año, en pacientes con un número mayor o igual a 5 adenomas o adenomas de 20 mm o más.DISEÑO:Estudio descriptivo, retrospectivo, multicéntrico, de cohortes. Calculamos el riesgo absoluto de desarrollar cáncer colorrectal, adenomas avanzados y pólipos serrados avanzados en la colonoscopia de vigilancia al año. Los factores de riesgo potenciales para el desarrollo de una neoplasia avanzada en el seguimiento, fueron evaluados mediante un análisis de regresión logística univariable y multivariable.AJUSTES:Este estudio incluyó datos de un programa de cribado de cáncer colorrectal de cohorte multicéntrico, realizado entre enero de 2014 y diciembre de 2015, con base en pruebas inmunoquímicas de materia fecal, en España.PACIENTES:Incluimos 2119 participantes con al menos un adenoma ≥20 mm o con cinco o más adenomas de cualquier tamaño.PRINCIPALES MEDIDAS DE RESULTADO:Calculamos el riesgo absoluto de desarrollar cáncer colorrectal, adenomas avanzados y pólipos serrados avanzados en la colonoscopia de vigilancia al año. Los potenciales factores de riesgo para desarrollar una neoplasia avanzada en el seguimiento, se evaluaron mediante un análisis de regresión logística univariable y multivariable.RESULTADOS:Al año se encontraron en los pacientes participantes, 6 cánceres colorrectales (0,3%), 228 adenomas avanzados (10,5%) y 58 pólipos serrados avanzados (2,7%). Mediante el análisis ajustado se identificaron dos factores asociados con el desarrollo de neoplasia avanzada: un número igual o mayor a 5 adenomas (razón de probabilidades 1,53; IC del 95%: 1,15-2,03; p = 0,004) y la presencia de pólipos en una ubicación proximal (razón de probabilidades 1,52; IC del 95%: 1,15-2,02; p = 0,004).LIMITACIONES:Primero, el tamaño de la muestra fue relativamente pequeño en comparación con otros estudios con objetivos similares. Otra limitación fue la falta de un grupo comparativo, que podría haber proporcionado resultados más prácticos, en términos de recomendaciones de vigilancia.CONCLUSIÓNES:La tasa de detección de cáncer colorrectal mediante una colonoscopia de vigilancia al año, fue baja entre los pacientes clasificados como de alto riesgo de neoplasia avanzada. Los factores de riesgo para desarrollar una neoplasia avanzada fueron; un número igual o mayor a 5 adenomas y la presencia de pólipos proximales en la colonoscopia inicial de base. Consulte Video Resumen en http://links.lww.com/DCR/B820 . ( Traducción-Eduardo Londoño-Schimmer ).

[Ultrasonographic evaluation of thyroid nodules: comparison with cytologic and histologic diagnosis].

The purpose of this study was to evaluate our ultrasonographic classification of thyroid nodules, based on echo structure, echogenicity, calcification, margin and analysis of the surrounding parenchyma. From January 1998 to January 2002, 2,468 consecutive patients with thyroid nodules were referred for thyroid ultrasonography and ultrasound-guided fine needle aspiration biopsy (USFNAB) in our Thyroid Unit. Among 1,039 nodules classified as benign on ultrasound, 998 (96.1%) were also benign on cytology, 37 (3.6%) were suspicious and only 4 (0.4%) were malignant. On the other hand, among 153 nodules classified as suspicious on ultrasound, 20 (13.1%) were suspicious and 88 (57,5%) were malignant on cytology. Of the 71 nodules suspicious on ultrasound submitted to surgery, 67 (94.3%) were malignant and 56 (96.6%) of 58 nodules considered benign were benign on pathologic studies. In conclusion, we advocate USFNAB in nodules classified as indeterminate or suspicious. Nodules classified as benign may be followed up at periodic intervals.

Favorable Survival After Screening for Young-Onset Colorectal Cancer: Benefits of Screening in Young Adults.

The increasing incidence and mortality of young-onset colorectal cancer has drawn increasing attention. However, screening for young adults is controversial given the limited evidence regarding its effectiveness. We aimed to clarify the characteristics of young-onset colorectal cancer and to compare long-term outcomes of screening-detected colorectal cancer and non-screening-detected colorectal cancer. This was a retrospective cohort study. This study evaluated data from a colorectal cancer registry and medical records at a tertiary Japanese cancer center. All patients with colorectal cancer who were registered at a Japanese tertiary cancer center between January 2007 and December 2016 were included. The colorectal cancer cases were categorized as screening-detected colorectal cancer and non-screening-detected colorectal cancer, and patients were categorized into 3 age groups: <50 years (young-onset), 50 to 75 years, and >75 years. The baseline characteristics and survival outcomes of the groups were compared using Cox regression models. A total of 4345 patients were identified, with a median follow-up of 4.6 years. Relative to 50- to 75-year-old individuals, young-onset colorectal cancer was linked to a higher proportion of rectal cancer (50.4% vs 43.3%), a lower proportion of screening-detected colorectal cancer (29.4% vs 35.8%), a lower proportion of stage I colorectal cancer (15.2% vs 30.3%), and a higher proportion of stage III to IV colorectal cancer (64.0% vs 49.4%). Among patients who were <50 years old, screening-detected colorectal cancer was associated with a 50% lower risk of mortality relative to non-screening-detected colorectal cancer (HR, 0.50; 95% CI, 0.26-0.95). The findings were limited by the retrospective analysis from a single center. Young-onset colorectal cancer was more likely to present at an advanced stage and had a lower rate of screening-detected colorectal cancer. Nevertheless, young-onset screening-detected colorectal cancer was associated with better overall survival than non-screening-detected colorectal cancer. See Video Abstract at http://links.lww.com/DCR/B829 . ANTECEDENTES:La creciente incidencia y mortalidad del cáncer colorrectal en paciente joven ha atraído una atención cada vez mayor. Sin embargo, el cribado para adultos jóvenes es controvertido, dado la evidencia limitada con respecto a su efectividad.OBJETIVO:Nuestro objetivo fue identificar las características del cáncer colorrectal en paciente joven y comparar los resultados a largo plazo del cáncer colorrectal detectado por cribado y el cáncer colorrectal no detectado por cribado.DISEÑO:Este fue un estudio de cohorte retrospectivo.ESCENARIO:Este estudio evaluó datos de un registro de cáncer colorrectal y registros médicos en un centro oncológico terciario japonés.PACIENTES:Se incluyeron todos los pacientes con cáncer colorrectal registrados en un centro oncológico terciario japonés entre enero de 2007 y diciembre de 2016.PRINCIPALES MEDIDAS DE RESULTADO:Los casos de cáncer colorrectal se categorizaron como cáncer colorrectal detectado mediante cribado y cáncer colorrectal no detectado mediante cribado, y los pacientes se clasificaron en tres grupos de edad: <50 años (joven), 50-75 años y >75 años. Las características basales y los resultados de supervivencia de los grupos se compararon mediante modelos de regresión de Cox.RESULTADOS:Se identificaron un total de 4345 pacientes, con una mediana de seguimiento de 4,6 años. En relación con las personas de 50 a 75 años, el cáncer colorrectal de inicio en la juventud se relacionó con una mayor proporción de cáncer de recto (50,4% frente a 43,3%), una menor proporción de cáncer colorrectal detectado mediante exámenes de cribado (29,4% frente a 35,8%), una menor proporción de cáncer colorrectal en estadio I (15,2% frente a 30,3%) y una mayor proporción de cáncer colorrectal en estadio III-IV (64,0% frente a 49,4%). Entre los pacientes menores de 50 años, el cáncer colorrectal detectado mediante cribado se asoció con un 50% menos de riesgo de mortalidad, en comparación con el cáncer colorrectal no detectado mediante cribado (HR: 0,50; IC 95%: 0,26-0,95).LIMITACIONES:Los hallazgos fueron limitados por el análisis retrospectivo de un solo centro.CONCLUSIONES:El cáncer colorrectal en paciente joven presenta más probabilidades de presentarse en una etapa avanzada y con una tasa más baja de detección mediante cribado. No obstante, el cáncer colorrectal detectado por cribado de aparición temprana se asoció con una mejor supervivencia general que el cáncer colorrectal no detectado por cribado. Consulte Video Resumen en http://links.lww.com/DCR/B829 . (Traducción-Dr. Felipe Bellolio ).

[Comparison of the usefulness of intraoperative examination and fine needle aspiration biopsy in thyroid lesions. Analysis of discordant cases in aspiration biopsy].

Fine-needle aspiration biopsy (FNAB) is currently considered the most reliable and cost effective examination for diagnosis of solitary thyroid nodules prior to surgery. Because of its great utility the indication of intraoperative examination (IOE) (macroscopic examination, cytology and frozen section), has recently been questioned. To compare the accuracy of the FNAB and IOE, in those patients with nodular thyroid disease who undergo thyroidectomy. As well as to analyse the, discrepant cases by FNAB. The results of IOE and FNAB were compared in a period of two years (1997-98) at the Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ). In all cases the diagnosis established from paraffin embedded tissue sections was considered to be the gold standard. The cytologyc smears and the histologic sections of the discrepant cases were reviewed. One thousand and fourteen IOE were done during two consecutive years; from these cases, 136 (13.4%) were thyroid lesions. Half of the thyroid lesions (69 cases) corresponded to carcinomas, the others were follicular adenomas (13 cases) and non-neoplasic lesions (54 cases). The analysis of the copacity to discriminate between malignant and benign diseases with IOE and FNAB demonstrated sensitivity of 89% (CI: 78.2-95.1) and 97.7% (CI: 86.8-99.9), specificity of 100% (CI: 93.1-100) and 90% (CI: 90.4-96.7). The positive predictive value of 100% and 91.6%, negative predictive value of 90.4% and 97.3%, and equal accuracy (94.6% and 94.1% respectively). When the analysis of capacity to stratify diseases was performed, IOE and FNAB showed similar percentages in all the cases, including the follicular adenomas and carcinomas. The causes of false positive and false negative cases by FNAB, reproduce what has been written in the literature. FNAB preoperative examination is adequate for the selection of patients that undergo thyroidectomy. Nevertheless, IOE should be done in most of the cases, and routinely in those cases with inconclusive FNAB results and in cases of follicular tumor.

Transanal Minimally Invasive Surgical Management of Persisting Pelvic Sepsis or Chronic Sinus After Low Anterior Resection.

Redo surgery of persisting pelvic sepsis or chronic presacral sinus after low anterior resection for rectal cancer is challenging. Transanal minimally invasive surgery improves visibility and accessibility of the deep pelvis. The aim of this study was to compare the conventional approach with transanal minimally invasive surgery for redo pelvic surgery with or without anastomotic reconstruction. This is a retrospective cohort study. This study was conducted in a tertiary referral center. All consecutive patients undergoing redo pelvic surgery after low anterior resection for rectal cancer between January 2005 and March 2018 were included. Redo surgery was divided into redo anastomosis and intersphincteric completion proctectomy. Transanal minimally invasive surgery procedures since November 2014 were compared with the conventional approach. Primary end points were procedural characteristics and 90-day major complications. In total, 104 patients underwent redo surgery; 47 received a redo anastomosis (18 conventional and 29 transanal minimally invasive surgery) and 57 underwent intersphincteric completion proctectomy (35 conventional and 22 transanal minimally invasive surgery). The transabdominal part of the transanal minimally invasive surgery procedures was performed laparoscopically in 72% and 59% of redo anastomosis and intersphincteric completion proctectomy, compared with 6% and 34% in the conventional group (p < 0.001 and p = 0.100). The 90-day major complication rate was 33% and 45% after redo anastomosis (p=0.546) and 29% and 41% after intersphincteric completion proctectomy (p=0.349) in conventional surgery and transanal minimally invasive surgery. A limitation of this study is the relatively small sample size. This study suggests that transanal minimally invasive surgery is a valid alternative to conventional top-down redo pelvic surgery for persisting pelvic sepsis or chronic sinus, with more often a laparoscopic approach for the abdominal part. See Video Abstract at http://links.lww.com/DCR/B87. MANEJO QUIRÚRGICO TRANSANAL MÍNIMAMENTE INVASIVO DE LA SEPSIS PÉLVICA PERSISTENTE O DE UN SENO CRÓNICO DESPUÉS DE RESECCIÓN ANTERIOR BAJA: La cirugía de reoperación por sepsis pélvica persistente o un seno presacro crónico después de una resección anterior baja por cáncer de recto es un desafío. La cirugía transanal mínimamente invasiva mejora la visibilidad y la accesibilidad a la región profunda de la pelvis.El objetivo de este estudio fue comparar el abordaje convencional con la cirugía transanal mínimamente invasiva para cirugía pélvica de reoperación con o sin reconstrucción anastomótica.Este es un estudio de cohorte retrospectiva.Este estudio se realizó en un centro de referencia terciario.Se incluyeron todos los pacientes consecutivos que se sometieron a una cirugía pélvica de reoperación después de una resección anterior baja por cáncer de recto entre enero de 2005 y marzo de 2018.La cirugía de reoperación se dividió en reconstrucción de anastomosis y proctectomía interesfintérica. Los procedimientos de cirugía transanal mínimamente invasiva desde noviembre de 2014 se compararon con el abordaje convencional.Los puntos primarios fueron las características del procedimiento y las complicaciones mayores a 90 días.En total, 104 pacientes fueron sometidos a cirugía de reoperación; 47 recibieron una reconstrucción de anastomosis (18 abordaje convencional y 29 cirugía transanal mínimamente invasiva) y 57 se sometieron a una proctectomía interesfintérica (35 abordaje convencional y 22 cirugía transanal mínimamente invasiva). La parte transabdominal de los procedimientos de cirugía transanal mínimamente invasiva se realizó por vía laparoscópica en el 72% y el 59% de las reconstrucciones de anastomosis y las proctectomías interesfintéricas, respectivamente, en comparación con el 6% y el 34%, respectivamente, en el grupo convencional (p <0.001 y p = 0.100). La tasa de complicaciones mayores a los 90 días fue del 33% y del 45% después de la anastomosis de reconstrucción (p = 0.546) y del 29% y 41% después de la proctectomía interesfintérica (p = 0.349) en cirugía convencional y cirugía transanal mínimamente invasiva, respectivamente.La limitación de este estudio es el tamaño relativamente pequeño de la muestra.Este estudio sugiere que la cirugía transanal mínimamente invasiva es una alternativa válida para la cirugía pélvica de reoperación convencional en sepsis pélvica persistente o seno crónico, con un abordaje laparoscópico utilizado más frecuentemente para la parte abdominal. Vea el Abstract del video en http://links.lww.com/DCR/B87.

[Preoperative evaluation of cytologically indeterminate thyroid nodules with 18F-FDG PET].

The aim of this article is to discuss the role of 18F-FDG Positron Emission Tomography (PET) in the preoperative evaluation of patients with cytologically indeterminate thyroid nodules. All studies with patients with thyroid cancer were selected to the calculation of sensitivity. Only studies aiming to evaluate patients with thyroid nodules whose cytological result was indeterminate were selected to establish the specificity. The finding of focal 18F-FDG uptake at PET was associated with the presence of thyroid malignancy in most of the studies. The sensitivity of the exam to the detection of thyroid malignancy was extremely high, but the specificity varied from 0 to 66%. In our experience, the specificity was 39%. In conclusion, the studies suggest that 18F-FDG PET can reduce the number of unnecessary thyroidectomies performed in patients with cytologically indeterminate thyroid nodules. However, the relatively high percentage of false positive results, the high costs, the low availability of this exam in developing countries and the low clinical experience still restrict the use of 18F-FDG PET when recommended with this aim.

Clinical Anastomotic Leakage After Rectal Cancer Resection Can Be Predicted by Pelvic Anatomic Features on Preoperative MRI Scans: A Secondary Analysis of a Randomized Controlled Trial.

We demonstrated previously that radiation proctitis induced by preoperative radiotherapy is a predisposing factor for clinical anastomotic leakage in patients undergoing rectal cancer resection. Quantitative measurement of radiation proctitis is needed. This study aimed to quantitate the changes of anatomic features caused by preoperative radiotherapy for rectal cancer and evaluate its ability to predict leakage. It was a secondary analysis of a randomized controlled trial (NCT01211210). MRI variables were retrospectively assessed. The study was conducted in the leading center of the trial, which is a tertiary GI hospital. Patients undergoing preoperative chemoradiation with sphincter-preserving surgery were included. Anatomic features were measured by preradiotherapy and postradiotherapy MRI. Univariate analyses were used to identify prognostic factors. Receiver operating characteristic curves were constructed to determine the cutoff value of the changes of MRI variables in predicting leakage. Eighteen (14.4%) of the 125 included patients developed clinical anastomotic leakage. Baseline characteristics were comparable between leakage group and nonleakage group. Relative increments of width of presacral space, thickness of rectal wall, and distal end of sigmoid colon discriminate between the 2 groups better than random chance. Relative increments of width of presacral space was the best performing predictor, with area under the curve of 0.722, sensitivity of 66.7%, specificity of 72.0%, and positive and negative predictive value of 28.6% and 92.8%. The study was limited by its small sample size and retrospective design. Increments of the width of the presacral space, thickness of rectal wall, and distal part of the sigmoid colon helps to identify individuals not at risk for clinical anastomotic leakage after rectal cancer resection. The first variable is the strongest predictor. Changes of these variables should be taken into consideration when evaluating the application of defunctioning stoma. See Video Abstract at http://links.lww.com/DCR/B23. NCT1211210. LAS FUGAS ANASTOMÓTICAS CLÍNICAS DESPUÉS DE LA RESECCIÓN DEL CÁNCER DEL RECTO PUEDEN PREDECIRSE POR LAS CARACTERÍSTICAS ANATÓMICAS PÉLVICAS EN LAS IMAGENES DE RESONANCIA MAGNÉTICA PREOPERATORIA: UN ANÁLISIS SECUNDARIO DE UN ESTUDIO CONTROLADO ALEATORIZADO:: Anteriormente demostramos que la proctitis inducida por la radiación de radioterapia preoperatoria es un factor predisponente para la fuga anastomótica clínica en pacientes sometidos a resección de cáncer rectal. Es necesaria la medición cuantitativa de la proctitis por radiación.Este estudio tuvo como objetivo cuantificar los cambios en las características anatómicas causados por la radioterapia preoperatoria para el cáncer de recto y evaluar su capacidad para predecir las fugas anastomoticas.Fue un análisis secundario de un estudio controlado aleatorio (NCT01211210). Los variables de imagines de resonancia magnetica se evaluaron retrospectivamente.Se llevó a cabo en el centro principal del estudio, que es un hospital gastrointestinal terciario.Se incluyeron pacientes sometidos a quimiorradiación preoperatoria con cirugía conservadora del esfínter.Las características anatómicas se midieron mediante imagines de resonancia magnetica previa y posterior a la radioterapia. Se utilizaron análisis univariados para identificar los factores pronósticos. Las curvas de características operativas del receptor se construyeron para determinar el valor de corte de los cambios de los variables de resonancia magnetica en la predicción de fugas.Dieciocho (14.4%) de los 125 pacientes incluidos desarrollaron fugas anastomóticas clínicas. Las características basales fueron comparables entre el grupo de fugas y el grupo de no fugas. Los incrementos relativos del ancho del espacio presacro, el grosor de la pared rectal y distal del colon sigmoide discriminan entre los dos grupos mejor que la posibilidad aleatoria. Los incrementos relativos del ancho del espacio presacro fueron el mejor pronóstico con un AUC de 0.722, sensibilidad del 66.7%, especificidad del 72.0%, valor predictivo positivo y negativo del 28.6% y 92.8%.Estaba limitado por el tamaño de muestra pequeño y el diseño retrospectivo.Los incrementos en el ancho del espacio presacro, el grosor de la pared rectal y la parte distal del colon sigmoide ayudan a identificar a las personas que no tienen riesgo de fuga anastomótica clínica después de la resección del cáncer rectal. La primera variable es el predictor más fuerte. Los cambios de estos variables deben tenerse en cuenta al evaluar la aplicación del estoma para desvio. Vea el Resumen del Video en http://links.lww.com/DCR/B23.

[Needle aspiration cytology in thyroid surgery (our experience in 104 operated cases)].

In the least years Fine Needle Aspiration Biopsy (FNAB) is more and more becoming a routine exam in the thyroid diagnostics. Nevertheless, its exact role and diagnostic value is still an argument under discussion, in spite of well known usefulness and safety of the method. The aim of this study, based on our experience, is to verify, if and how much FNAB findings could have modified the diagnostic schedule, the surgical indications and the number of malignancies in a group of operated patients for thyroid nodular disease. In this experience a series of 104 patients have been studied in the Ia Clinica Chirurgica-Ia Facoltà, Università degli Studi di Napoli in the years 1988-90; the indication for a surgical treatment was due to a nodular thyroid disease. Aspiration cytology was performed in these patients before surgery and afterwards was determined the correlation between cytologic and hystological findings. The clinical and scan assessment also contributed to indicate the surgical management of the disease. On the basis of this study FNAB has to be considered as a quite reliable diagnostic tool in thyroid lesions; it results free of complications, with good sensitivity (75%), specificity (82.6%) and diagnostic accuracy (81.7%). A peculiar consequence of the use of cytology, is the increased number of adenoca (11.5%) preoperatively diagnosed, a percentage of which otherwise would have been a histopathological postoperative "surprise". However, the possibility of "false negative" and "false positive" lends further support to the concept that FNAB alone cannot determinate the choice between medical or surgical treatment of thyroid nodular lesions.

Joaquín Baleztena Ascárate

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