[A Case of Small Bowel Obstruction Caused by an Intraoperatively Recognized Low-Grade Appendiceal Mucinous Neoplasm].

An 89-year-old woman with an allergy to contrast dye and with a history of cholecystectomy visited emergency department complaining of vomiting and abdominal pain. The diagnosis of adhesive bowel obstruction near terminal ileum was made with plain computed tomography. Although intestinal decompression was attempted with nasogastric tube, followed by intestinal tube, no improvement was achieved, so adhesiolysis was planned. Intraoperatively, an extrinsic mass was detected near the terminal ileum, and ileocecal resection was performed. the pathological diagnosis was low grade appendiceal mucinous neoplasm, and margin was negative. Postoperative course was almost smooth, but due to the pre-existing low activity of daily life, she was transferred to a health facility for recuperation on postoperative day 42. When we diagnose small bowel obstruction near the terminal ileum, we need to keep it in mind that appendiceal tumor is one of the differential diagnoses, although the incidence rate is low.