title: Impact of type of liver resection on the outcome of colorectal liver metastases: a case-matched analysis.
abstract: BACKGROUND
  Wedge resection (WR) for colorectal liver metastases (CLM) has become more common in an attempt to preserve liver parenchyma. However, some investigator have reported that WR is associated with a higher incidence of positive margin and an inferior survival compared with anatomic resection (AR) 1.
  
  
  OBJECTIVE
  This study evaluated survival, margin status, and pattern of recurrence of patients with CLM treated with WR or AR.
  
  
  METHODS
  We identified 208 consecutive patients, in a single institutional database from 1995 to 2004, who underwent either WR or AR. WR was defined as a nonanatomic resection and AR was defined as single resection of one or two liver segments. Patients with combined WR-AR and patients requiring resection of more than two segments or radiofrequency ablation were excluded from the analysis.
  
  
  RESULTS
  One hundred six patients underwent WR and 102 patients had AR. There were no differences in the rate of positive surgical margin (P = 0.146), overall recurrence rates (P = 0.211), and patterns of recurrence between the two groups (P = 0.468). The median survival was 32 months for WR and 42 for AR, with 5-year survival rates of 29% and 27% respectively, with no significant difference (P = 0.308). Morbidity was similar between the two groups.
  
  
  CONCLUSIONS
  WR is a safe procedure and does not disadvantage the patients in terms of tumor recurrence and overall survival.
authors.affiliation: Department of Surgery-Liver Unit, Scientific Institute H San Raffaele, Vita-Salute San Raffaele University, Milan, Italy. guzzetti.eleonora@hsr.it
authors.forename: Eleonora
authors.initials: E
authors.lastname: Guzzetti
authors.forename: Carlo
authors.initials: C
authors.lastname: Pulitanò
authors.forename: Marco
authors.initials: M
authors.lastname: Catena
authors.forename: Marcella
authors.initials: M
authors.lastname: Arru
authors.forename: Francesca
authors.initials: F
authors.lastname: Ratti
authors.forename: Renato
authors.initials: R
authors.lastname: Finazzi
authors.forename: Luca
authors.initials: L
authors.lastname: Aldrighetti
authors.forename: Gianfranco
authors.initials: G
authors.lastname: Ferla
mesh_terms: D000368:Aged; D016022:Case-Control Studies; D015179:Colorectal Neoplasms / Q000473:pathology*; D005260:Female; D006498:Hepatectomy / Q000379:methods*; D006801:Humans; D008113:Liver Neoplasms / Q000556:secondary* / Q000601:surgery*; D008297:Male; D009364:Neoplasm Recurrence, Local / Q000175:diagnosis; D011446:Prospective Studies; D012189:Retrospective Studies; D015996:Survival Rate; D016896:Treatment Outcome