title: Percutaneous radiofrequency ablation of painful osseous metastases: a multicenter American College of Radiology Imaging Network trial.
abstract: BACKGROUND
  The study was conducted to determine whether radiofrequency ablation (RFA) can safely reduce pain from osseous metastatic disease.
  
  
  METHODS
  The single-arm prospective trial included patients with a single painful bone metastasis with unremitting pain with a score >50 on a pain scale of 0-100. Percutaneous computed tomography-guided RFA of the bone metastasis to temperatures >60 degrees C was performed. Endpoints were the toxicity and pain effects of RFA before and at 2 weeks, 1 month, and 3 months after RFA.
  
  
  RESULTS
  Fifty-five patients completed RFA. Grade 3 toxicities occurred in 3 of 55 (5%) patients. RFA reduced pain at 1 and 3 months for all pain assessment measures. The average increase in pain relief from pre-RFA to 1-month follow-up is 26.3 (95% confidence interval [CI], 17.7-34.9; P < .0001), and the increase from pre-RFA to 3-month follow-up is 16.38 (95% CI, 3.4-29.4; P = .02). The average decrease in pain intensity from pre-RFA to 1-month follow-up was 26.9 (P < .0001) and 14.2 for 3-month follow-up (P = .02). The odds of lower pain severity at 1-month follow-up were 14.0 (95% CI, 2.3-25.7; P < .0001) times higher than at pre-RFA, and the odds at 3-month follow-up were 8.0 (95% CI, 0.9-15.2; P < .001) times higher than at pre-RFA. The average increase in mood from pre-RFA to 1-month follow-up was 19.9 (P < .0001) and 14.9 to 3-month follow-up (P = .005).
  
  
  CONCLUSIONS
  This cooperative group trial strongly suggests that RFA can safely palliate pain from bone metastases.
authors.affiliation: Department of Diagnostic Imaging, the Warren Alpert Medical School at Brown University, Providence, RI 02903, USA. ddupuy@lifespan.org
authors.forename: Damian E
authors.initials: DE
authors.lastname: Dupuy
authors.forename: Dawei
authors.initials: D
authors.lastname: Liu
authors.forename: Donna
authors.initials: D
authors.lastname: Hartfeil
authors.forename: Lucy
authors.initials: L
authors.lastname: Hanna
authors.forename: Jeffrey D
authors.initials: JD
authors.lastname: Blume
authors.forename: Kamran
authors.initials: K
authors.lastname: Ahrar
authors.forename: Robert
authors.initials: R
authors.lastname: Lopez
authors.forename: Howard
authors.initials: H
authors.lastname: Safran
authors.forename: Thomas
authors.initials: T
authors.lastname: DiPetrillo
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001859:Bone Neoplasms / Q000556:secondary* / Q000601:surgery*; D017115:Catheter Ablation / Q000009:adverse effects; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D059408:Pain Management; D010166:Palliative Care