Mesothelioma Questions

T represents the size and spread of the tumor.  Mesothelioma in all T stages involves one side of the membrane covering the lungs and lining the walls of the chest known as the pleura.

T1: cancer has spread to the pleura covering the lung;
T2: cancer has spread to the outer lining of the lung, the diaphragm, or the lung;
T3: cancer has spread into the first layer of the chest wall or a spot in the chest wall, the fatty part of the area between the sternum and the spinal column known as the mediastinum, or the outer layer of the heart;
T4: cancer has spread into the chest wall, through the diaphragm, into an organ within the mediastinum, into the spine, across to the opposite pleura, through the lining of the heart or into the heart, or into the nerves leading to the arm.