It usually fades. On the glabrous skin this presents as a warty fast-growing nodule, usually on the hand, lip , ear or face. This carcinoma has a base that is usually indurated and rounded and may be dusky red or purple. Crusted ulcerations may occur. If left untreated, metastases will occur sooner from tumors at the mucocutaneous junctions.
Anaplasia can be severe, especially at sites of radiodermatitis, and rapid removal is imperative.
Screening for malignant melanoma is imperative as the only cure is early detection and removal. The warning signs of early melanoma are A, asymmetry, B, border irregularity, C, colors, two or more, and D, diameter greater than 6 mm, the approximate size of a pencil eraser. Family history of malignant melanoma 3. Actinic keratoses 4. Marked freckling of upper back 5.