Here is information about the types of mesothelioma from the Asbestos Resource Center:
Tumors of the mesothelium can be either benign (non-cancerous) or malignant (cancerous). Since malignant mesothelioma is much more common than benign mesothelioma it is often simply called mesothelioma. Characteristics of a malignant tumor are that it has the ability to spread to other parts of the body, making it much more dangerous.
Malignant mesothelioma is divided into three types: epithelioid, sarcomatoid, and mixed/biphasic. 50% to 70% of mesothelioma cases are epithelioid, which also has the best prognosis (outlook for survival). 7% to 20% are of the sarcomatoid type, and 20% to 35% are the mixed/biphasic type. Epithelioid affects the membranous tissue covering internal organs and other internal surfaces of the body. Sarcomatoid arises from supportive tissue, such as bone, muscles, cartilage, or fat. Biphasic mesothelioma has features of both epithelioid and sarcomatoid. The treatment options are the same for each type.
Approximately three-fourths of mesothelioma cases start in the chest cavity and are known as pleural mesothelioma. Another 10% to 20% begin in the abdomen and are called peritoneal mesothelioma. Those starting in the cavity around the heart, or pericardial mesothelioma, are very rare. The covering layer of the testicles is actually an outpouching of peritoneum into the scrotum. Mesothelioma that affects this covering of the testicles is quite uncommon.
If you need more information about asbestos, mesothelioma, or your legal rights, you can call Schaeffer & Lamere at (618) 467-8200 or toll free at (888) 783-9679. Consultations are always free.