cf842907___Melanoma_Research_Foundation__Description
[Melanoma Stage] 0 [Treatment Option] The tumor and some surrounding tissue are removed surgically. Usually no further treatment is necessary; however, continued skin examination to evaluate for a new melanoma or other skin cancer will continue. [Description] 
The tumor is confined to epidermis and has not entered the dermis, a deeper layer of the skin. This stage of melanoma is also called melanoma in situ.
Stages of Melanoma Diagnosis | Melanoma Research Foundation
Description