Melanoma in situ
Melanoma in situ (syn. melanotic precancerosis) is a preliminary stage of malignant melanoma. It is a multiplication of atypical melanocytes (cells responsible for the dark color) in the epidermis. The atypical cells have not yet broken through the basal membrane, i.e. the membrane between the epidermis and subcutis. Untreated, a malignant melanoma (malignant black skin … Melanoma in situ