title: Microvessel quantification and its possible relation with liver metastasis in colorectal cancer.
abstract: BACKGROUND
  Several studies have proven the usefulness of microvessel quantification as a prognostic factor for patients with various malignant tumors. The aim of this paper was to clarify the relationship between microvessel density (MVD) as a parameter of tumor angiogenesis and liver metastasis in colorectal cancer.
  
  
  METHODS
  A total of 175 patients with advanced colorectal cancer were evaluated (58 with concurrent liver metastases). Microvessel quantification was performed immunohistochemically, using monoclonal antibodies against endothelial protein Factor VIII-related antigen (F8RA) and against endothelial surface marker CD34. Finally, the relationship between MVD and liver metastasis was analyzed.
  
  
  RESULTS
  A significant correlation was observed between MVD for F8RA and MVD for CD34 (n = 175, r = 0.9560, P = 0.0001). MVD in the tumors stained for F8RA ranged from 15.2 to 78.6 microvessels per x 200 field (mean 32.8 +/- 11.7), while the tumors with liver metastatic disease compared with the tumors without liver metastasis (F8RA; mean 36.1 +/- 11.3 vs. 31.2 +/- 11.5, P = 0.0090; CD34; mean 64.4 +/- 20.4 vs. 52.0 +/- 19.4, P = 0.0010).
  
  
  CONCLUSIONS
  Microvessel quantification within a colorectal tumor using immunohistochemical staining methods has shown a significant correlation between MVD and liver metastasis. Tumors with a greater MVD may thus have a greater hematogenous metastatic propensity.
authors.affiliation: Department of Surgery II, Kyushu University, Fukuoka, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Tomisaki
authors.forename: S
authors.initials: S
authors.lastname: Ohno
authors.forename: Y
authors.initials: Y
authors.lastname: Ichiyoshi
authors.forename: H
authors.initials: H
authors.lastname: Kuwano
authors.forename: Y
authors.initials: Y
authors.lastname: Maehara
authors.forename: K
authors.initials: K
authors.lastname: Sugimachi
mesh_terms: D000368:Aged; D000911:Antibodies, Monoclonal; D018952:Antigens, CD34 / Q000032:analysis; D015179:Colorectal Neoplasms / Q000098:blood supply* / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008113:Liver Neoplasms / Q000556:secondary* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D009389:Neovascularization, Pathologic / Q000378:metabolism*; D013194:Staining and Labeling / Q000379:methods; D014841:von Willebrand Factor / Q000032:analysis
chemical_list: D000911:Antibodies, Monoclonal; D018952:Antigens, CD34; D014841:von Willebrand Factor