In stage 3 mesothelioma, the cancer is found spreading near the point where it started by the lining of the lungs. Tumors from this cancer are located throughout the pleural lining on the chest. The areas that can become infected are the heart sac, between the lungs, the chest wall, and the diaphragm. In stage 3 the tumors have not yet spread to other organs unlike stage 4. The TNM system was updated this month by the American Joint Committee where they break stage 3 mesothelioma up into two sections; A and B.
Stage 3A: The cancer has spread to lymph nodes and potentially the heart sac and chest wall. The tumors have developed into areas such as the lungs, diaphragm, and mediastinum on one side of the chest. Fortunately, surgery is still an option to remove all of the tumors.
Stage 3B: Depending on the size of the tumors that have developed and how much the lymph nodes are affected, there ae two different variations. It can be possible to remove the tumors with surgery if the cancer has not spread too far, even if it already affected the lymph nodes. In some cases, the cancer has spread to much from where it initially began to completely ensure that surgery would remove it all.