RADIOLOGY: GASTROINTESTINAL: GI: Case# 33702: DIVERTICULOSIS. 64-year-old male. 1. Intraluminal splenic flexure mass with intussusception, but without evidence of bowel obstruction. 2. Slight irregular thickening of the peritoneum in the left upper quadrant. Diagnostic considerations here would include peritoneal metastasis, diaphragmatic slips, and possibly thickening associated with longterm peritoneal dialysis. 3. Free intraperitoneal fluid is compatible with peritoneal dialysis. 4. Colonic diverticulosis without evidence of diverticulitis. 5. Small atrophic kidneys consistent with the history of renal disease. 6. There is no evidence of liver metastases or of adenopathy.