NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,919 terms related to cancer and medicine.

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stage I melanoma
(... 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.