title: Neoadjuvant treatment of unresectable colorectal liver metastases: correlation between tumour response and resection rates.
abstract: BACKGROUND
  Long-term survival is reported in patients with liver metastases of colorectal cancer. Recently, an increased number of reports on liver resection following neoadjuvant chemotherapy in patients with initially unresectable liver metastases has been published.
  
  
  METHODS
  We analysed all published or presented trials and retrospective studies that report the rate of objective response and the rate of resection of initially unresectable metastases to correlate objective response and the rate of resection of metastases.
  
  
  RESULTS
  In studies that enrolled patients with metastases confined to the liver, 24-54% of patients were resected following chemotherapy, compared to 1-26% of patients in trials that included non-selected patients with metastatic colorectal cancer. A strong correlation was found between response rates and the resection rate in studies with patients with isolated liver metastases (r = 0.96, P=0.002). Likewise, in studies with non-selected patients, the resection rate of metastases also was associated with the objective response rate (r = 0.74, P <0.001).
  
  
  CONCLUSIONS
  Patient selection and efficacy of pre-operative chemotherapy are both strong predictors for resectability of liver metastases. Resectability is a novel endpoint focusing on the curative potential of treatment compared with classical endpoints of response or progression-free survival that are important if palliation is the aim. Therefore, patients with potentially resectable liver metastases should be investigated in special trials and interdisciplinary teams.
authors.affiliation: University Hospital Dresden, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Folprecht
authors.forename: A
authors.initials: A
authors.lastname: Grothey
authors.forename: S
authors.initials: S
authors.lastname: Alberts
authors.forename: H-R
authors.initials: HR
authors.lastname: Raab
authors.forename: C-H
authors.initials: CH
authors.lastname: Köhne
mesh_terms: D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D015179:Colorectal Neoplasms / Q000188:drug therapy* / Q000473:pathology / Q000601:surgery; D003131:Combined Modality Therapy; D006801:Humans; D008113:Liver Neoplasms / Q000188:drug therapy* / Q000556:secondary / Q000601:surgery; D020360:Neoadjuvant Therapy; D012189:Retrospective Studies; D015996:Survival Rate