Abstract
A 62-year-old man presented with right lower abdominal pain. On physical examination, tenderness was noted in the right upper guadrant, thus, acute appendicitis was suspected. Abdominal CT scan showed a lesion in the ileocecal region, a diagnosis of an abscess secondary to appendicitis or a cecal tumor was discounted. The possibility of neoplasm was considered since the inflammatory reaction was negligible, and colon endoscopy was done, but neither a tumor nor a diverticulum was noted in the colon. During surgery, a normal appendix was found, there was an inflammatory mass in the ileocecal region. An ileocecal resection was carried out. There was a divertivculum on the ileum located 5 cm from the ileocecal valve, where the mesenteric abscess had formed. On pathology, a diagnosis of a mesenteric abscess due to a perforated duplication cyst of the ileum was made. The patient was discharged from the hospital on the 13th postoperative day.
