title: Characteristic differences between patients who have undergone surgical treatment for lung metastasis or hepatic metastasis from colorectal cancer.
abstract: OBJECTIVE
  The characteristic differences between patients with lung or liver metastases from colorectal carcinoma (CRC) have not yet been clarified. A small group of these patients demonstrate a better prognosis, and the selection criteria for resection of liver and/or lung metastasis are not well defined. It is important to compare and analyze the most common metastatic sites, which include liver metastases and lung metastases. The objective of this study was to compare the characteristics of the two groups in order to identify patients who benefitted from surgical resection of CRC.
  
  
  METHODS
  We retrospectively reviewed the medical charts of 80 patients who had undergone resection for liver or lung metastasis from CRC in Fukuoka University Hospital between June 1991 and December 2004. These patients were grouped according to surgical therapy received for the metastases, and separated into two groups, as follows: LUM, lung metastases resection; LIM, liver metastases resection. We evaluated these groups for a set of several factors.
  
  
  RESULTS
  The characteristic factors between the two groups (LUM vs. LIM) demonstrated significant differences according to histological differentiation, venous invasion, and lymphatic permeation. There was a statistical difference in the disease-free interval (DFI) between the two groups (947.06 +/- 840.39 days in LUM vs. 246.03 +/- 229.26 days in LIM). Although serum CEA levels at resection of metastasis showed significant differences between the groups (LUM, 13.25 +/- 31.55 ng/ml; LIM, 55.21 +/- 99.52 ng/ml), the primary serum CEA levels were not significantly different. Overall survival rates at 5 years were 37.0 % for LUM and 42.8 % for LIM. There was no significant difference in the survival rate of the LUM vs. the LIM group after resection of metastasis. The Cox proportional hazards regression model was used to determine serum CEA status at the time of the metastases and showed a significant difference indicating poor prognosis for patients with LUM, but the results were not significant for LIM cases.
  
  
  CONCLUSIONS
  Candidates for surgical treatment for lung or liver metastases from CRC may be an acceptable for the same valuable approach, even if characteristic differences were observed in each group.
authors.affiliation: Second Department of Surgery, School of Medicine, Fukuoka University, Japan. iwasaki@fukuoka-u.ac.jp
authors.forename: A
authors.initials: A
authors.lastname: Iwasaki
authors.forename: T
authors.initials: T
authors.lastname: Shirakusa
authors.forename: Y
authors.initials: Y
authors.lastname: Yamashita
authors.forename: T
authors.initials: T
authors.lastname: Noritomi
authors.forename: T
authors.initials: T
authors.lastname: Maekawa
authors.forename: T
authors.initials: T
authors.lastname: Hamada
mesh_terms: D002272:Carcinoembryonic Antigen / Q000097:blood; D015179:Colorectal Neoplasms / Q000401:mortality / Q000473:pathology* / Q000601:surgery; D018572:Disease-Free Survival; D005260:Female; D006498:Hepatectomy; D006801:Humans; D008113:Liver Neoplasms / Q000556:secondary* / Q000601:surgery*; D008175:Lung Neoplasms / Q000556:secondary* / Q000601:surgery*; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D011013:Pneumonectomy; D011379:Prognosis; D012189:Retrospective Studies; D015996:Survival Rate
chemical_list: D002272:Carcinoembryonic Antigen