title: Radiofrequency ablation versus surgical resection for single nodule hepatocellular carcinoma: long-term outcomes.
abstract: BACKGROUND
  Radiofrequency ablation (RFA) has been increasingly utilized for treatment of hepatocellular carcinoma (HCC). Long-term results of RFA, especially in comparison to surgical resection, have not been well described.
  
  
  METHODS
  Eighty-seven patients with single nodule HCC underwent surgical resection (N=47) or RFA (N=40) during a 9-year period. RFA was performed for 36 unresectable disease and 4 surgical refusals. Each group was further divided based on tumor size for analysis; Group 1: resection, <or=5 cm (N=18), Group 2: RFA, <or=5 cm (N=26), Group 3: resection, >5 cm (N=29) and Group 4: RFA, >5 cm (N=14). Follow-up ranged from 2 to 72 months (median 16 months). Patients' characteristics, local recurrences and overall and disease-free survivals were compared.
  
  
  RESULTS
  Patients who underwent RFA were older (69 versus 60, p=0.0006), had more advanced Child-Pugh class and TNM stage (p=0.0002 and p=0.016, respectively), and had smaller tumors (4.6 versus 7.4 cm, p=0.0032). Local recurrence rates were 2% for resection and 10% for RFA (p=0.12). These local and other recurrences were subsequently treated with multimodal therapies as indicated. The median overall and disease-free survivals were equivalent both between Groups 1 and 2 (49 versus 51 months, p=0.44, 36 versus 22 months, p=0.84), and Groups 3 and 4 (47 versus 463 months, p=0.94, 28 versus 20 months, p=0.67).
  
  
  CONCLUSIONS
  Although the groups were not truly comparable, this retrospective study suggests that RFA may offer similar long-term results to surgical resection for single nodule HCC when combined with multimodal treatments.
authors.affiliation: Department of Surgery, University of Hawaii School of Medicine, Honolulu, Hawaii, USA. makotoogihara@msn.com
authors.forename: Makoto
authors.initials: M
authors.lastname: Ogihara
authors.forename: Linda L
authors.initials: LL
authors.lastname: Wong
authors.forename: Junji
authors.initials: J
authors.lastname: Machi