MALIGNANT TRANSFORMATION OF BENIGN MESENTERIC CYST

We describe the clinical and pathological features of a case of mesent eric cyst which was incompletely excised, recurred over several years, and eventually underwent malignant transformation. A review of the li terature shows how mesenteric cysts are still poorly understood clinic al entities, often difficult to classify even after histopathological evaluation. This is the first reported case of transformation of a ben ign mesenteric cyst into adenocarcinoma. Complete excision of all mese nteric cysts should be carried out, to prevent recurrence and possible malignant transformation.