Abstract
Generally, lymphangioma is divided into three classes, i.e., simple, cavernous and cystic. Among these types, cystic lymphangioma originating from retroperitoneal lymphatic vessels is rare, and especially those containing chylous fluid are very uncommon. Cystic lymphangioma, usually found in children aged about ten years, and particularly in males, may follow a proliferative and invasive course. Recently, an 8-year-old boy was admitted to our hospital with upper abdominal pain one week after blunt abdominal trauma. Abdominal examination suggested acute abdomen and surgery revealed retroperitoneal cystic lymphangioma beside the second portion of duodenum containing chylous fluid with no other abnormal findings. In this case, the cyst disappeared after internal drainage. It seems that the surgical goal should be complete excision whenever possible, since recurrence sometimes follows sucessful resection.
