Stage IIIB non-small cell lung cancer (2). Drawing shows cancer in lymph nodes on the same side of the chest as the primary tumor, in the heart, major blood vessels that lead to or from the heart, the trachea, esophagus, sternum, carina, and in separate tumors in different lobes of the same lung; the diaphragm is also shown. Inset shows cancer that has spread from the lung, through the membrane around the heart, into the heart.