Occupational koilonychia of the toe nails.
D003615:Dancing; D009262:Nails / Q000293:injuries; D009264:Nails, Malformed / Q000175:diagnosis / Q000209:etiology*; D009784:Occupational Diseases; D011312:Pressure; D012775:Shoes; D013997:Time Factors; D014034:Toes / Q000293:injuries