Pseudomesenteric cyst.

Mesenteric cyst and cystic mesenteric tumour are very rare abdominal growth, which is generally encountered, in the second decade of life. Pseudomesenteric cyst is another variant with traumatic and infective etiology is rare in itself. Only 14 cases have been reported previously in the Japanese literature. Emergency operation was performed in only 3 patients. The etiology of the pseudocyst manifested by acute abdomen was unknown [1]. A case of pseudomesenteric cyst presented in the emergency with acute abdomen is reported here.