Diffuse and banded melanin pigmentation in nails.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D044383:Black People; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008544:Melanocytes; D008548:Melanosis / Q000453:epidemiology / Q000473:pathology*; D008875:Middle Aged; D009262:Nails; D012871:Skin Diseases / Q000453:epidemiology / Q000473:pathology