The half-and-half nail.
D000328:Adult; D000368:Aged; D001806:Blood Urea Nitrogen; D003937:Diagnosis, Differential; D005260:Female; D006402:Hematologic Diseases / Q000175:diagnosis*; D006801:Humans; D007674:Kidney Diseases / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D009264:Nails, Malformed