Unusual appearance of a mesenteric cyst. Case report.

A 43-year old female with an 8 month history of abdominal discomfort was admitted to our hospital. The initial diagnosis was splenomegaly. Laboratory tests were normal. Ultrasounds revealed a mass (9 cm) of general cystic appearance ventral to the left kidney with a flat-fluid level. At CT, the mass showed fat density above and water density below the fluid level. Differential diagnoses are discussed. The final diagnosis of a mesenteric cyst could be established by coeliac and superior mesenteric arteriography and was confirmed histopathologically.