Abstract
A 54-year-old patient with a one-year history of epigastric pain without significant physical findings had computed tomography evidence of a malignant peritoneal tumor. Examination of a specimen removed during exploratory laparatomy suggested a malignant peritoneal mesothelioma. The outcome was fatal. Malignant peritoneal mesothelioma is infrequent. The diagnosis is difficult and requires histologic studies. Exposure to asbestos is suggestive.