[Increasing abdominal pain caused by abdominal tumor in a 21-year-old female].

Lymphangiomas are congenital malformations which occur mostly in the neck and head region of children. They are rarely located in the mesenterium or retroperitoneum in adults. We present a case of mesenteric cystic lymphangioma in a young woman who was admitted to hospital with a history of increasing abdominal pain. We discuss diagnostic means, differential diagnosis, and therapeutic management of the disease.