Dyskeratosis congenita.
D000293:Adolescent; D006801:Humans; D007972:Leukoplakia, Oral; D008297:Male; D009264:Nails, Malformed; D012871:Skin Diseases / Q000151:congenital* / Q000473:pathology; D012880:Skin Pigmentation; D014060:Tongue Diseases