Definition

Stage III is divided into stages IIIA, IIIB, IIIC, and IIID. In stage IIID, the tumor is more than 4 millimeters thick, with ulceration (a break in the skin). Cancer is found: (1) in four or more lymph nodes, or in any number of lymph nodes that are matted together; or (2) in two or more lymph nodes and/or in any number of lymph nodes that are matted together. There are microsatellite tumors, satellite tumors, and/or in-transit metastases on or under the skin.