title: Percutaneous radiofrequency thermocoagulation of osteoid osteomas: factors affecting therapeutic outcome.
abstract: OBJECTIVE
  To examine factors which affect local recurrence of osteoid osteomas treated with percutaneous CT-guided radiofrequency thermocoagulation.
  
  
  METHODS
  A prospective study was carried out on 45 patients with osteoid osteoma who underwent percutaneous radiofrequency thermocoagulation with a minimum follow-up of 12 months.
  
  
  RESULTS
  There were seven local recurrences (16%); all occurred within the first year. Local recurrence was significantly related to a non-diaphyseal location (P<0.01). There was no significant relationship (P=0.05) between local recurrence and age of the patient, duration of symptoms, previous treatment, size of the lesion, positive biopsy, radiofrequency generator used or the number of needle positions. There were no complications.
  
  
  CONCLUSIONS
  Osteoid osteomas in a non-diaphyseal location are statistically more likely to recur than those in a diaphyseal location when treated with CT-guided percutaneous radiofrequency thermocoagulation. This relationship between local recurrence and location has not been previously reported.
authors: Robert Jones and Agnes Hunt Orthopaedic Hospital, Oswestry SY10 7AG, UK.
authors: G L
authors: GL
authors: Cribb
authors: W H
authors: WH
authors: Goude
authors: P
authors: P
authors: Cool
authors: B
authors: B
authors: Tins
authors: V N
authors: VN
authors: Cassar-Pullicino
authors: D C
authors: DC
authors: Mangham
mesh_terms: D000293:Adolescent; D000328:Adult; D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000601:surgery*; D017115:Catheter Ablation / Q000379:methods; D018483:Diaphyses / Q000473:pathology*; D005260:Female; D005266:Femoral Neoplasms / Q000000981:diagnostic imaging / Q000601:surgery*; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D009364:Neoplasm Recurrence, Local; D010017:Osteoma, Osteoid / Q000000981:diagnostic imaging / Q000601:surgery*; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome