Abstract
A 78-year-old man consulted his doctor for a mass in the left side of the abdomen. Abdominal computed tomography scan revealed a multilocular tumor in the left side of the abdomen. Considering the possibility of the mass being malignant, a laparotomy was performed. The tumor was found located in the mesentery of the jejunum and adhered closely to the jejunum wall. Therefore, tumor removal with partial resection of the jejunum was performed. The final pathological diagnosis was lymphangioma of the jejunal mesentery. The patient was discharged 10 days after the surgery. This report documents a rare case of lymphangioma of the jejunal mesentery in an adult.