Male; 46 years old. Reason: patient with ulcerative colitis found to have rectal adenocarcinoma on colonoscopy evaluate wall invasion and lymph nodes History: same PELVIS:PROSTATE/SEMINAL VESICLES: No significant abnormality noted.BLADDER: No significant abnormality noted.LYMPH NODES: Scattered subcentimeter perirectal and bilateral pelvic sidewall lymph nodes are not enlarged by size criteria.BOWEL, MESENTERY: In the distal rectum along the right anterolateral wall approximately 10 cm from the anal verge, there is mild increased mucosal and wall enhancement with slight thickening in a curvilinear fashion measuring up to 2 x 0.5 cm (AP by transverse, series 1303/368). This finding is nonspecific and may be related to postsurgical change from recent colonoscopy, however, this also may be due to underlying tumor given that a sessile lesion was seen near this location on recent colonoscopy. No focal, intraluminal mass. No evidence of perirectal fat invasion.At the 7 o'clock position near the anal verge, there is a rim-enhancing lesion at the 7 o'clock position measuring up to 1 cm and extending to the skin surface of the right medial gluteal cleft, suspicious for small perianal abscess.Submucosal fatty infiltration of the visualized signal rectal colon, most likely due to chronic inflammatory bowel disease. There is also perirectal fibrofatty proliferation. The partially visualized proximal colon is collapsed, limiting evaluation.BONES, SOFT TISSUES: No significant abnormality noted.OTHER: No significant abnormality noted.
1.Mucosal and wall enhancement with slight thickening of the rectum as detailed above, which is nonspecific and may be related to postsurgical change from recent colonoscopy versus known underlying lesion. No definite mesorectal fat invasion.2.Small perianal abscess, measuring up to 10 mm.3.Findings of chronic inflammatory bowel disease.4.Subcentimeter perirectal and bilateral pelvic sidewall lymph nodes are not enlarged by size criteria.