melanoma in situ. In this case, this melanoma is limited to the outermost layer of the skin or the epidermis. In cases such as this, an evaluation of a dermatologist is highly recommended for proper management. A simple surgical removal produces virtually a complete cure rate. However, if left untreated, the melanoma grows deeper in the skin and is more likely to produce a life-threatening situation. This link may be helpful: http://www.aad.org/public/publications/pamphlets/sun_malignant.html
Take care and regards.