Ethnic nail pigmentation is usually easy to recognize by its familial inheritance and the polydactylic distribution of the bands. When observed with epiluminescence microscopy the bands have a fairly homogeneous grey background and thin grey lines comparable with those observed in lentigo (Figure 12.10).
Ungual lentigo in an adult's finger nail. Dermoscopy reveals a relatively homogeneous greyish background (between the two short arrows) and superimposed thin grey lines (long arrows).
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