NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,128 terms related to cancer and medicine.
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- stage I melanoma
- listen (... MEH-luh-NOH-muh)
Stage I is divided into stages IA and IB. In stage IA, the tumor is not more than 1 millimeter thick, with no ulceration (a break in the skin). In stage IB, (1) the tumor is not more than 1 millimeter thick and it has ulceration; or (2) the tumor is more than 1 but not more than 2 millimeters thick, with no ulceration.