[On the problem of degeneration of pigment cell tumors of the skin by the action of mechanical traumas].
D006801:Humans; D008545:Melanoma / Q000209:etiology*; D008548:Melanosis / Q000150:complications*; D009506:Nevus; D009508:Nevus, Pigmented / Q000150:complications*; D012878:Skin Neoplasms / Q000209:etiology*
MELANOMA/etiology; MELANOSIS/complications; NEVUS, PIGMENTED/complications; SKIN NEOPLASMS/etiology