title: Hydroxyapatite deposition disease around the hip: outcomes of CT-guided treatment.
abstract: OBJECTIVE
  Hydroxyapatite deposition disease (HADD) around the hip joint is a self-limiting condition usually treated conservatively. The aim of the present study is to directly compare the outcomes of CT-guided and conservative treatments in cases of refractory hip HADD.
  
  
  METHODS
  Two groups of patients with refractory hip HADD were prospectively constructed from a pool of 484 patients referred for greater trochanter pain syndrome, based on the presence of calcifications around the hip and the failure of conservative treatment. Study group included 22 hips, which underwent CT-guided barbotage and steroid injection treatment, whereas control group consisted of 28 hips that were treated conservatively. Evaluation of the outcome of both groups was performed over a one-year follow-up period with the use of a score measuring clinical improvement in terms of pain and functional impairment.
  
  
  RESULTS
  Three weeks after the initiation of treatment, study group exhibited significantly higher scores compared with the control group (P < 0.001). Improvement scores of the control group were similar to the study group after three months of treatment (P > 0.1).
  
  
  CONCLUSIONS
  CT-guided treatment provides relief of debilitating symptoms in the acute phase.
authors.affiliation: Department of Radiology, Medical School, University of Crete and the Department of Medical Imaging, University Hospital of Heraklion, Crete, Greece. akarantanas@gmail.com.
authors.forename: Michail E
authors.initials: ME
authors.lastname: Klontzas
authors.forename: Evangelia E
authors.initials: EE
authors.lastname: Vassalou
authors.forename: Aristeidis H
authors.initials: AH
authors.lastname: Zibis
authors.forename: Apostolos H
authors.initials: AH
authors.lastname: Karantanas
mesh_terms: D000328:Adult; D000368:Aged; D002114:Calcinosis / Q000150:complications* / Q000000981:diagnostic imaging; D000072700:Conservative Treatment; D005260:Female; D005500:Follow-Up Studies; D006621:Hip Joint / Q000473:pathology*; D006801:Humans; D006882:Hydroxyapatites / Q000009:adverse effects; D007592:Joint Diseases / Q000150:complications* / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000000981:diagnostic imaging / Q000188:drug therapy*; D015641:Radiography, Interventional / Q000379:methods; D013256:Steroids / Q000008:administration & dosage* / Q000627:therapeutic use; D014057:Tomography, X-Ray Computed / Q000379:methods*; D016896:Treatment Outcome
chemical_list: D006882:Hydroxyapatites; D013256:Steroids