Mesothelioma Introduction

Mesothelioma is a rare form of cancer in which malignant (cancerous) cells are found in the mesothelium, a protective sac that covers most of the body's internal organs. With rare exceptions, most mesothelioma cancers are considered malignant mesothelioma. The two major types of malignant mesothelioma are pleural mesothelioma, which concerns the mesothelium membrane that surrounds the lungs, and peritoneal mesothelioma which concerns the mesothelium layer that covers the organs in the abdominal cavity. The prognosis, therapy (including types of chemotherapy) and treatment choices are similar whether the cancer is pleural mesothelioma or peritoneal mesothelioma.