Lymphangioma is a malformation of the lymphatic system, which can involve any part of the body. However, lymphangioma in the gastrointestinal tract is uncommon. Large intestine is the least commonly involved site. The authors encountered a case of lymphangioma mimicking neoplastic polyp located in the rectum of a 65-year-old woman on screening colonoscopy. The surface mucosa showed dark red. The vascular pattern was difficult to define on narrow-band imaging. This polyp was reckoned as a neoplastic polyp and endoscopic mucosal resection was performed. Histologic examination revealed lymphangioma accompanying pressure induced necrosis. This case indicates the possibility of misdiagnosis due to pressure necrosis of mucosa.

• 신원재(한림대학교 의과대학 내과학교실) | Won Jae Shin
• 방창석(한림대학교 의과대학 내과학교실) | Chang Seok Bang
• 엄정호(한림대학교 의과대학 내과학교실) | Jeong Ho Eom
• 곽경민(한림대학교 의과대학 내과학교실) | Kyong Min Kwak
• 이정욱(한림대학교 의과대학 내과학교실) | Jung wook Lee
• 백광호(한림대학교 의과대학 내과학교실) | Gwang Ho Baik Corresponding author
• 한상학(병리학교실) | Sang Hak Han