Peritoneal Mesothelioma Not Caused by Asbestos Malignant peritoneal mesothelioma forms in the lining of the abdomen. It is less common than pleural mesothelioma, and it is more common in women than men. The symptoms of peritoneal msothelioma could be vague, like abdominal discomfort constipation, weight loss or diarrhoea. A mesothelioma
