title: Hydroxyapatite associated disease in an elderly female: differentiation from aseptic necrosis.
abstract: The crystal arthropathies caused by monosodium urate and calcium pyrophosphate dihydrate are commonly recognised, but the destructive arthropathy associated with the deposition of calcium hydroxy-apatite is less well known in general clinical practice. We describe a case with many of the classical features of hydroxy-apatite associated disease and discuss the features differentiating the condition from aseptic necrosis.
authors.affiliation: Department of Rheumatology, City Hospital, Aberdeen.
authors.forename: D F
authors.initials: DF
authors.lastname: Smith
authors.forename: D M
authors.initials: DM
authors.lastname: Reid
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D017886:Durapatite; D005260:Female; D006801:Humans; D006882:Hydroxyapatites; D007592:Joint Diseases / Q000000981:diagnostic imaging*; D010020:Osteonecrosis / Q000000981:diagnostic imaging*; D011859:Radiography; D012785:Shoulder Joint / Q000000981:diagnostic imaging*
chemical_list: D006882:Hydroxyapatites; D017886:Durapatite