A 63-year-old man presented with abdominal pain in the lower right quadrant and high fever. An abdominal CT scan on admission revealed ileocecal wall thickening and inflammation of the terminal ileum. No foreign body was observed on CT scan. He received antibiotic therapy, but no improvement was noticed. Colonoscopy showed a sporadic type 0- I s+ II c lesion in the sigmoid colon. Histological examination showed well differentiated adenocarcinoma. We diagnosed the patient as having inflammation of the terminal ileum and sigmoid colon cancer. Laparoscopic surgery was performed. Inflammation was present in the terminal ileum, and local resection and sigmoidectomy were performed. A foreign body that appeared to be a fish bone was present in the resected specimen, and this led to the diagnosis of granulomatous inflammation of the ileum caused by fish bone. In the sigmoid colon, the pathological diagnosis was pT1b(sm), pN0, ly1, v1, pDM0, pPM0, R0, pStage I . He was discharged without any complication and has not shown any evidence of recurrence more than 1 year after surgery.
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