title: Familial expansile osteolysis.
abstract: Familial expansile osteolysis (FEO) is a unique bone dysplasia, which has, over five generations, affected 42 members of a Northern Ireland family. The disease follows a classic autosomal dominant pattern of inheritance. The condition is distinct enough in its clinical features and natural history to be recognized as a new and unique disease. There are both general and focal skeletal changes, the latter having a predominantly peripheral distribution and an onset from the second decade. Progressive osteoclastic resorption accompanied by medullary expansion leads to severe and painful disabling deformities with a tendency to pathologic fracture. Most affected members of the family have an associated early-onset deafness and loss of dentition as a result of unique middle ear and dental abnormalities. The serum alkaline phosphatase and urinary hydroxyproline are elevated to a variable degree, whereas other biochemical indices are normal. The response of the disease to a therapeutic trial using parenteral dichloro-methylene-diphosphonate (dichloro-MDP) produced an initial rapid biochemical response, which was not sustained.
authors.affiliation: Musgrave Park Hospital Belfast, Northern Ireland.
authors.forename: R G
authors.initials: RG
authors.lastname: Wallace
authors.forename: R J
authors.initials: RJ
authors.lastname: Barr
authors.forename: P H
authors.initials: PH
authors.lastname: Osterberg
authors.forename: R A
authors.initials: RA
authors.lastname: Mollan
mesh_terms: D001848:Bone Diseases, Developmental / Q000188:drug therapy / Q000235:genetics*; D004002:Clodronic Acid / Q000627:therapeutic use; D003638:Deafness / Q000235:genetics; D005260:Female; D005799:Genes, Dominant; D008040:Genetic Linkage; D006801:Humans; D008297:Male; D009660:Northern Ireland; D010014:Osteolysis / Q000188:drug therapy / Q000235:genetics*; D010375:Pedigree; D014091:Tooth Resorption / Q000235:genetics
chemical_list: D004002:Clodronic Acid