title: Papillon-Lefévre syndrome.
mesh_terms: D002675:Child, Preschool; D004550:Elbow; D005385:Fingers; D006801:Humans; D007645:Keratoderma, Palmoplantar / Q000175:diagnosis*; D007717:Knee; D008297:Male; D009262:Nails; D010510:Periodontal Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011859:Radiography; D012867:Skin / Q000473:pathology; D013577:Syndrome