Cutaneous Pigmented lesions not related to melanocytic naevi
Before discussing the spectrum of cutaneous melanocytic naevi and melanomas, it is useful to discuss briefly the large variety of cutaneous pigmented lesions unrelated to these entities. We shall restrict ourselves largely to lesions in which increased melanin production is an essential and sometimes striking feature; the large variety of cutaneous lesions which may show only slight increase in pigmentation of the epidermal basal layer, or which may be pigmented macroscopically for other reasons, will not be discussed. Other lesions, which appear pigmented clinically largely because of epidermal hyperkeratosis, often associated with papillomatosis, such as linear epidermal naevus, acanthosis nigricans and hypertrophic solar keratosis, will be referred to briefly.
KeywordsMerkel Cell Carcinoma Acanthosis Nigricans Intradermal Naevus Epidermal Melanocyte Rete Ridge
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