Stage 0 melanoma in situ; drawing shows skin anatomy with an abnormal area on the surface of the skin. Both normal and abnormal melanocytes and melanin are shown in the epidermis (outer layer of the skin). Also shown are the dermis (inner layer of the skin) and the subcutaneous tissue below the dermis.
Stage 0 melanoma in situ. Abnormal melanocytes are in the epidermis (outer layer of the skin).