[Mesenteric cysts (author's transl)].

Mesenteric cysts belong to the rare abdominal diseases. Histomorphologically, they are classified as cystic lymphangiomas. Even though most frequently localized in the mesentery of the small intestine, they can originate from any part of the abdominal cavity with two peritoneal linings. The content of the cysts is either serous or chylous possessing immunologic active proteins. This is demonstrated by its highly antibacterial activity. Whereas in children the onset of symptoms is acute due to intestinal obstruction, in adults it is mainly chronic abdominal pains without exact localisation and often in combination with a longstanding palpable tumour. In addition to routine procedure the diagnostics includes sonography, cavography and barium meal radiography of the stomach and intestines. In some cases, especially those with solid parts angiography and computer-tomography are of additional value. Surgery is the therapeutic method of choice. Preference is given to enucleation and resection with or without removal of part of the intestine corresponding to the mesentery baring the cyst. Drainage methods are of historical interest only. In our 9 cases (3 children and 6 adults) resection was performed in 7 and enucleation in 2 cases. The postoperative courses were uneventful.