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NCI Dictionary of Cancer Terms

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stage II melanoma  listen  (... MEH-luh-NOH-muh)

  Stage II is divided into stages IIA, IIB, and IIC. In stage IIA, (1) the tumor is more than 1 but not more than 2 millimeters thick, with ulceration (a break in the skin); or (2) more than 2 but not more than 4 millimeters thick, with no ulceration. In stage IIB, (1) the tumor is either more than 2 but not more than 4 millimeters thick, with ulceration; or (2) more than 4 millimeters thick, with no ulceration. In stage IIC, the tumor is more than 4 millimeters thick, with ulceration.

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Three-panel drawing of stage II melanoma. The left panel shows two stage IIA tumors. One tumor is more than 1 but not more than 2 millimeters thick, with ulceration (break in the skin); the other tumor is more than 2 but not more than 4 millimeters thick, with no ulceration. The right panel shows two stage IIB tumors. One tumor is more than 2 but not more than 4 millimeters thick, with ulceration; the other tumor is more than 4 millimeters thick, with no ulceration. The bottom panel shows a stage IIC tumor that is more than 4 millimeters thick, with ulceration. Also shown are the epidermis (outer layer of the skin), the dermis (inner layer of the skin), and the subcutaneous tissue below the dermis.