Cystic subdiaphragmatic retroperitoneal mass ABDOMEN:LIVER, BILIARY TRACT: Scattered subcentimeter hepatic cysts. The hepatic and portal veins are patent. No biliary ductal dilation.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: No significant abnormality noted.BOWEL, MESENTERY: Nonenhancing cystic subdiaphragmatic mass in the left upper quadrant measures 3.6 x 2.4 cm (series 3, image 11). No focal wall thickening or nodular components with thin wall. The mass is separate from the adrenal gland and does not abut the neural foramina. BONES, SOFT TISSUES: No significant abnormality noted.
1.Cystic subdiaphragmatic mass in the left upper quadrant is most consistent with a enteric duplication cyst. Neurogenic tumor and lymphangioma are considered much less likely given the location and signal characteristics.