Loterre: Patologías humanas: melanonychia

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melanonychia

Melanonychia is a black or brown pigmentation of the normal nail plate, and may be present as a normal finding on many digits in Afro-Caribbeans, as a result of trauma, systemic disease, or medications, or as a postinflammatory event from such localized events as lichen planus or fixed drug eruption.There are two types, longitudinal and transverse melanonychia. (Wikipedia)

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