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Melanonychia - Longitudinal Melanonychia - Melanonychia Striata And Treatment of Melanonychia

Longitudinal melanonychia is the presence of a pigmented stripe, usually brown or black, along the length of the nail bed in darker-skinned individuals. Longitudinal melanonychia results from deposition of melanin in the nail plate from a variety of causes. A small number of people with longitudinal melanonychia have subungual melanoma.

Longitudinal melanonychia associated with scleroderma is rare. This is paradoxical, as increased skin pigmentation is frequent in the latter disease.