Abstract
A 67-year-old man was admitted to hospital with right lower abdominal pain and fever. He had tenderness and muscle guarding in the right lower quadrant of the abdomen and a high grade fever. The white blood cell count was 17,100/μL and C-reactive protein level was 19.3mg/dL. Abdominal CT showed severe inflammatory changes in the ileocecal region and a mass of about 8cm in the ileocecal mesentery. Our diagnosis was an intramesenteric abscess due to acute appendicitis or colon diverticulitis, and a right hemicolectomy was performed. The resected specimen contained a mesenteric abscess of the ileocecal region, as well as a fistula about 5cm proximal to the ileum end which communicated with the abscess. The pathological diagnosis was mesenteric abscess caused by a penetrated diverticulum of the ileum. The postoperative course was uneventful and the patient was discharged from the hospital on the 13th postoperative day.
