Enterolith at the ileocecal valve mimicking a subepithelial mass.

A 32-year-old woman presented with chronic constipation for three years. Colonoscopy revealed a 2.5 cm subepithelial tumor-like lesion at the ileocecal (IC) valve with protrusion of the lesion into the lumen. A CT scan of the abdomen showed an oval-shape laminated calcified lesion adhered to the IC valve and several gallstones. An exploratory laparotomy to enterotomy with stone extraction and open cholecystectomy was performed. Operative findings showed stone erosion into the ileal wall with the lesion being covered with colonic mucosa. Pathologic examination of stones from the intestinal wall revealed an enterolith. The case exemplifies the infrequent cause of a subepithelial lesion of the gastrointestinal tract and a rare presentation of an enterolith as a subepithelial lesion within the terminal ileal wall.