Abstract
We report a case of lymphangioma of the mesoleum. A 71-year-old woman developed abdominal discomfort. Abdominal ultrasonography and MRI showed a multilocular cystic lesion adjacent to the ileum ; the PET-CT examination showed a high radiotracer concentration on FDG-PET. A mesenteric tumor was diagnosed, and surgery was performed. On laparotomy, a 4.5×3.5 cm tumor located 125 cm proximal from the ileum end was found in the mesoileum. The tumor along with part of the ileum was resected. The resected tumor was a multilocular cystic lesion that contained coagulated blood. On histopathology, the cyst was found to be lined with flat endothelial epithelium, which was positive for D2-40 on immunohistochemistry. Lymphangioma of the mesoileum is extremely rare in adults. The case is reviewed in context with other such cases presented in the Japanese literature.
