Abdominal lymphangioma of the mesentery is an uncommon, benign neoplasm that primarily originates in the lymphatic system and presents as an abdominal mass. It is a rare lesion in the pediatric population; in 2 major pediatric surgical centers, only 19 and 22 cases were reported in a 25- and 34-year period, respectively.1- 2 It is difficult to differentiate this tumor from a lymphatic cyst, which is due to a congenital defect in lymphatic development and is similar to lymphatic tumors that are found elsewhere (eg, cystic hygroma). Lymphangiomas, like cystic mesenteric tumors, may be unilocular or multilocular and have an endothelial lining with clear fluid contents. Most patients remain asymptomatic until the lesion exerts mass effect owing to its size (pressure sensation or postprandial fullness). Diagnosis is made by ultrasound or computed tomography, and in a few occurrences, prenatal ultrasonography.3 The differential diagnosis includes enterocele, dermoid, chylous, or serous retention cyst, traumatic cyst, and rarely, lymphangiosarcoma.