title: Long-term characteristics of 5-year survivors after liver resection for colorectal metastases.
abstract: BACKGROUND
  We investigated factors affecting 5-year survival in patients undergoing hepatic resection for colorectal cancer metastases, including events long after initial hepatectomy. Although retrospective studies have demonstrated survival benefit of hepatectomy for metastatic colorectal cancer, few have included sufficient 5-year survivors to identify survival-related factors throughout the clinical course.
  
  
  METHODS
  We divided 156 patients with hepatectomy for colorectal cancer metastases into 5-year survivors (n = 64) and patients dying before 5 years after hepatectomy (n = 92). Clinicopathologic data were compared retrospectively with respect to long-term outcome.
  
  
  RESULTS
  By multivariate analysis, large liver tumors (adjusted relative risk, 2.029; P = .011), short tumor doubling time (1.809; P = .026), and origin from poorly differentiated primary adenocarcinoma (12.632; P = .001) compromised survival, whereas initial treatment-related variables did not. Although no difference was seen in initial treatment-related variables between 5-year survivors with recurrence after hepatectomy and patients dying before 5 years, repeat surgery was used more frequently in survivors (P < .001), typically with adjuvant chemotherapy.
  
  
  CONCLUSIONS
  Reoperations for each recurrence of metastases, followed by additional chemotherapy, frequently resulted in long survival.
authors.affiliation: Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan. ktrj112@urahp.yokohama-cu.ac.jp
authors.forename: Kuniya
authors.initials: K
authors.lastname: Tanaka
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Shimada
authors.forename: Michio
authors.initials: M
authors.lastname: Ueda
authors.forename: Kenichi
authors.initials: K
authors.lastname: Matsuo
authors.forename: Itaru
authors.initials: I
authors.lastname: Endo
authors.forename: Shinji
authors.initials: S
authors.lastname: Togo
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D017024:Chemotherapy, Adjuvant; D015179:Colorectal Neoplasms / Q000401:mortality* / Q000473:pathology / Q000601:surgery; D003131:Combined Modality Therapy; D005260:Female; D005500:Follow-Up Studies; D006498:Hepatectomy / Q000401:mortality*; D006801:Humans; D007902:Length of Stay; D008113:Liver Neoplasms / Q000401:mortality* / Q000556:secondary / Q000601:surgery; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011379:Prognosis; D012086:Reoperation; D012189:Retrospective Studies; D015996:Survival Rate; D013997:Time Factors; D016896:Treatment Outcome