stage IIB non-small cell lung cancer

Stage II non-small cell lung cancer is divided into stages IIA and IIB. In stage IIB, the tumor is 3 centimeters or smaller and cancer has spread to a single group of lymph nodes in the middle of the chest between the lungs; OR the tumor is 5 centimeters or smaller and cancer has spread to the lymph nodes on the same side of the chest as the primary tumor. The lymph nodes with cancer are in the lung or near the bronchus. Also, one or more of the following may be found: (1) cancer has spread to the main bronchus, but has not spread to the carina; and/or (2) cancer has spread to the innermost layer of the membrane that covers the lung; and/or (3) cancer has spread to a lobe next to the lobe with the primary tumor; and/or (4) part of the lung or the whole lung has collapsed or has developed pneumonitis; OR cancer has not spread to lymph nodes and one or more of the following is found: (1) the tumor is larger than 5 centimeters but not larger than 7 centimeters; and/or (2) there are one or more separate tumors in the same lobe of the lung as the primary tumor; and/or (3) cancer has spread to any of the following: the membrane that lines the inside of the chest wall, the chest wall, certain nerves in the chest including the nerve that controls the diaphragm, a vein that helps return blood from the chest to the heart, and/or the outer layer of tissue of the sac around the heart.