CT APPEARANCE OF ACUTE ABDOMEN AS INITIAL PRESENTATION IN LYMPHOMA OFTHE LARGE AND SMALL-BOWEL

Computed tomography (CT) is playing an increasingly greater role as th e initial diagnostic imaging modality for acute abdomen. Abdominal pai n is the most common presenting complaint for intestinal lymphoma, and acute abdomen is a not infrequent admitting complaint. We present the CT findings of five patients with intestinal lymphoma whose initial c omplaint was acute abdomen. Of these five patients, four had an identi fiable mass that was located in the right lower quadrant, with the fif th patient having no identifiable mass on CT. The average mass size wa s 7.8 cm. Three of the patients showed involvement of the colon only, and two showed involvement of the small bowel only, with acute abdomen in only one of the patients with small-bowel involvement being due to direct extension from mesenteric lymph nodes, Pneumoperitoneum and fr ee intraperitoneal fluid were seen in two patients. It is important, t herefore, that the radiologist be aware that one of the causes of acut e abdomen with primary bowel involvement is lymphoma, which can simula te appendicitis or diverticulitis in its presentation clinically and b y physical examination.