Abstract
A 49-year-old man was admitted to our hospital because of left lower abdominal pain. On admission, he was febrile and had mild rebound tenderness in the left lower abdomen. Laboratory data showed leukocytosis and high values of serum CRP. Computed tomography (CT) scans of the abdomen after administration of contrast material showed an air-containing mass. The mass consisted of two elements; one had a thick wall and the other had no wall. We diagnosed this lesion as mesenteric abscess caused by penetration of the jejunal diverticulum. Immediate resection revealed an inflammatory mass in the jejunal mesentery located about 70 cm distal from the ligament of Treitz. The resected specimen contained a penetrating diverticulum, forming an abscess. Preoperative CT images corresponded well with pathologic findings. Similar cases have rarely been reported and preoperative diagnosis of penetrating jejunal diverticulum is usually difficult.
