8-year-old male with history of neuroblastoma, 2 years post therapy. ABDOMEN:LIVER, BILIARY TRACT: Similar-appearing faintly T2 hyperintense lesions that demonstrate enhancement on the 20 minute delayed series (axial series 2001 images 68, 78, 86) and consistent with focal nodular hyperplasia. Hypointense T2 signal of the background hepatic parenchyma compatible with deposition.SPLEEN: No significant abnormality noted.PANCREAS: No significant abnormality noted.ADRENAL GLANDS: No significant abnormality noted.KIDNEYS, URETERS: No significant abnormality noted.RETROPERITONEUM, LYMPH NODES: In the right retroperitoneum just proximal to the aortic bifurcation, a small 1.2 x 0.6 cm oval structure demonstrating hyperintense signal on the diffusion weighted series (axial series 408 image 32) has decreased in size since the 3/5/2014 CT exam (prior 1.5 x 0.7 cm).BOWEL, MESENTERY: No significant abnormality noted.BONES, SOFT TISSUES: See below.OTHER: No significant abnormality noted.PELVIS:PROSTATE/SEMINAL VESICLES: No significant abnormality noted.BLADDER: No significant abnormality noted.LYMPH NODES: No significant abnormality noted.BOWEL, MESENTERY: No significant abnormality noted.BONES, SOFT TISSUES: Lobulated T2 hyperintense eccentric lesion of the left femoral intertrochanteric region (axial series 701 image 21, coronal series 801 image 17) likely represents a small enchondroma, unchanged.Interval development of an exostosis from the left posterior-superior iliac bone with internal signal intensity following osseous matrix, and there is a curvilinear overlying T2 hyperintense signal. In retrospect, a minimal contour deformity in this region was present on the 9/30/2015 MRI exam (prior exam series 8 image 45), and no contour deformity was seen on the 3/5/2014 CT exam. Imaging appearance of this lesion is suggestive of an osteochondroma.Stable nonspecific T2 hyperintense signal of the T9, T10, and T11 vertebral bodies (coronal series 1501 image 21) with loss of signal on T2 fat saturated sequences. The small hyperintense lesion of the T11 vertebral body on the T2 fat saturated sequence (axial series 1801 image 31) demonstrating contrast enhancement is also unchanged.OTHER: No significant abnormality noted.
1.The known 3 liver lesions are stable in size and again demonstrate contrast enhancement on the 20 minute delayed/hepatobiliary phase consistent with focal nodular hyperplasia.2.Interval development of an exostosis from the left iliac crest with imaging features suggestive of an osteochondroma. Stable appearance of a small suspected left femoral enchondroma. Follow-up plain film radiographs are recommended.3.Interval decreased size of a small 1.2 x 0.6 cm oval right retroperitoneal structure demonstrating hyperintense signal on the diffusion weighted series compared to the 3/5/2014 CT exam (prior 1.5 x 0.7 cm). This structure is of unclear etiology.4.Stable T2 hyperintense signal of the lower thoracic vertebral bodies as described above.