Which physical findings are characteristic of melanonychia?

Updated: Sep 10, 2018
  • Author: Chris G Adigun, MD, FAAD; Chief Editor: William D James, MD  more...
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Melanonychia is characterized by a tan, brown, or black discoloration of the nail unit and is often observed in the nail plate. The nail plate may be diffusely involved, or only a single longitudinal band may be present. Transverse melanonychia has also been rarely reported. One or more digits may be involved.

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