Idiopathic atrophy of the nails.
D000293:Adolescent; D000328:Adult; D001284:Atrophy; D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008010:Lichen Planus / Q000175:diagnosis; D008297:Male; D009262:Nails; D009264:Nails, Malformed / Q000209:etiology; D012871:Skin Diseases / Q000175:diagnosis / Q000209:etiology