Characteristics include a blue/black stain of skin initially. Skin is thin, about 4-5 cell layers thick, which is often related to aging. Histological features include epidermal atrophy and increased number of melanocytes.
Lentigo maligna
Lentiginosis
Extramammary Paget's disease
Lymphomatoid papulosis
Acral lentiginous melanoma
Nodular melanoma
Nevus sebaceous
Ductal carcinoma in situ