title: Pycnodysostosis: (report of four cases).
mesh_terms: D000293:Adolescent; D002648:Child; D006801:Humans; D008297:Male; D009083:Mucopolysaccharidoses / Q000000981:diagnostic imaging*; D009087:Mucopolysaccharidosis VI / Q000000981:diagnostic imaging*; D010022:Osteopetrosis / Q000000981:diagnostic imaging*; D011859:Radiography; D013577:Syndrome