Peritoneal Mesothelioma Not Caused by Asbestos Malignant peritoneal mesothelioma forms in the abdomen's lining. It is less frequent than pleural mesothelioma and it is more prevalent in women than men. wyoming asbestos lawyer suffering from peritoneal mesothelioma usually exhibit vague symptoms, such as abdominal pain constipation, weight loss or diarrhoea.