Peritoneal Mesothelioma Not Caused by Asbestos Malignant peritoneal mesothelioma develops in the abdomen's lining. It is less prevalent than pleural mesothelioma. it affects women more than men. People with peritoneal mesothelioma often exhibit vague symptoms, such as abdominal pain, weight loss, constipation or diarrhoea. A mesothelioma specialist can assist with