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CT Abd Hydro, Stent migration

Findings: Contrast is present in the distal ileum and proximal colon. Free fluid (Hounsfield units measuring approximately 15) is present throughout the abdomen, paracolic gutters, pelvis and lesser sac. For comparison, fluid within the kidneys and bladder demonstrate approximately 3 Hounsfield units. A small focus of intraperitoneal air is present anterior to the left kidney, likely postsurgical. Several areas of fatty infiltration are present in the anterior abdominal wall consistent with recent endoscopic surgical procedure. The left kidney is enlarged with unchanged severe hydronephrosis. There is preserved renal excretion, just slightly decreased in attenuation when compared to the contralateral kidney. A left ureteral stent extends from the bladder lumen to the proximal ureter, not entering the renal pelvis. The appendix measures up to 7 mm in maximum dimension and contains a single focus of intraluminal air. Periappendiceal fat stranding is not visualized, although sensitivity is limited secondary to paucity of intra-abdominal fat and surrounding fluid. There is no evidence of lymphadenopathy or mass. The liver, spleen, pancreas, adrenal glands, and bladder are otherwise unremarkable. Osseous structures are unremarkable. Impression: 1. Left-sided severe hydronephrosis with mildly delayed excretion. Left ureteral stent terminates in the proximal ureter, not the renal pelvis. 2. Changes in the intra-abdominal wall consistent with recent endoscopic surgery.