Abstract
A 76-year-old man without symptoms had undergone a colonoscopy 3 years previously during which a semipedunculated submucosal tumor of 30 mm in diameter was found on the ileocecal valve. Since lymphangioma or lipoma was suspected on the basis of endoscopic findings, routine follow-up was performed. In comparison with the size of the tumor a year earlier, colonoscopy and computed tomography indicated that the tumor had enlarged. Since endoscopic excision was considered difficult to perform safely due to the large tumor size, laparoscopic-assisted ileocecal resection was performed. The tumor was 30×25 mm in size, and there were multiple cystic lesions in the submucosa. Histological diagnosis was lymphangioma. Lymphangioma on the ileocecal valve is very rare, and endoscopic excision is mainly performed for this lesion. Based on postoperative histopathological findings, we were able to determine that endoscopic excision would have been appropriate for this lymphangioma on the ileocecal valve.
