Peritoneal Mesothelioma Not Caused by Asbestos Malignant peritoneal melanoma develops in the abdominal lining. It is less frequent than the pleural type, and more women suffer than men. The symptoms of peritoneal mesothelioma may be vague, such as abdominal discomfort, weight loss, constipation or diarrhoea. A mesothelioma specialist can assist
