Pleural Mesothelioma Stages Mesothelioma is an aggressive, universally fatal, neoplasm arising from the serosal surfaces usually of the pleura (>90%), peritoneum (7%) or rarely the pericardium or tunica vaginalis. More than 90% of cases occur in the Pleura, thus it is called Pleural Mesothelioma.  There are 4 stages of Pleural Mesothelioma. They are  Stage 1: […]