title: Prognostic impact of anatomic resection for hepatocellular carcinoma.
abstract: OBJECTIVE
  To evaluate the prognostic impact of anatomic versus nonanatomic resection on the patients' survival after resection of a single hepatocellular carcinoma (HCC).
  
  
  BACKGROUND
  Anatomic resection is a reasonable treatment option for HCC; however, its clinical significance remains to be confirmed.
  
  
  METHODS
  Curative hepatic resection was performed for a single HCC in 210 patients; the patients were classified into the anatomic resection (n = 156) and nonanatomic resection (n = 54) groups. In 84 patients assigned to the anatomic resection group, segmentectomy or subsegmentectomy was performed. We evaluated the outcome of anatomic resection, including segmentectomy and subsegmentectomy, in comparison with that of nonanatomic resection, by the multivariate analysis taking into consideration 14 other clinical factors.
  
  
  RESULTS
  Both the 5-year overall survival and disease-free survival rates in the anatomic resection group were significantly better than those in the nonanatomic resection group (66% versus 35%, P = 0.01, and 34% versus 16%, P = 0.006, respectively). In the segmentectomy and subsegmentectomy group, the 5-year overall and disease-free survival rates were 67% and 28%, respectively, both of which were also higher than the corresponding rates in the nonanatomic resection group (P = 0.007 and P = 0.001, respectively). The results of multivariate analysis revealed that anatomic resection was a significantly favorable factor for overall and disease-free survivals: the hazard ratios were 0.57 (95% confidence interval, 0.32-0.99, P= 0.04), and 0.65 (0.43-0.96, P = 0.03).
  
  
  CONCLUSIONS
  Anatomic resection for a single HCC yields more favorable results rather than nonanatomic resection.
authors.affiliation: Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Hasegawa
authors.forename: Norihiro
authors.initials: N
authors.lastname: Kokudo
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Imamura
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Matsuyama
authors.forename: Taku
authors.initials: T
authors.lastname: Aoki
authors.forename: Masami
authors.initials: M
authors.lastname: Minagawa
authors.forename: Keiji
authors.initials: K
authors.lastname: Sano
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Sugawara
authors.forename: Tadatoshi
authors.initials: T
authors.lastname: Takayama
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Makuuchi
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D006528:Carcinoma, Hepatocellular / Q000401:mortality* / Q000601:surgery*; D018572:Disease-Free Survival; D005260:Female; D005500:Follow-Up Studies; D006498:Hepatectomy / Q000379:methods*; D006801:Humans; D008113:Liver Neoplasms / Q000401:mortality* / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D011379:Prognosis; D015996:Survival Rate