Abstract
We report a case of adult mesenteric pseudocyst. A 76-year-old man admitted for a palpable, growing abdominal mass and bilateral edema in lower extremities was found in abdominal computed tomography to have an apparently unilocular 21×14×20 cm cyst. Abdominal magnetic resonance imaging showed the cyst to be of low intensity in T1 weighed imaging and high intensity in T2 weighed imaging. Based on a preoperative diagnosis of an abdominal cyst strongly suspected of being a hepatic cyst, we conducted laparoscopic surgery, finding cystic mass in the gastrocolic ligament and resecting it. Histologically, the cyst wall consisted of fibrous tissue lacking epithelial lining in the lumen, typical of pseudocysts. We review 17 cases of mesenteric pseudocysts, including 2 cases involving laparoscopic surgery, reported in the Japanese literature.
