title: [Relationship between vascular endothelial growth factor expression and angiogenesis in osteosarcoma].
abstract: OBJECTIVE
  To determine the relationship between angiogenesis and vascular endothelial growth factor (VEGF) expression in osteosarcoma.
  
  
  METHODS
  The expression of VEGF was evaluated by immunohistochemical staining of tumor specimens from 33 patients with osteosarcoma. The microvessel density was assessed by immunostaining with CD34 in the most neovascularized area (hot spots).
  
  
  RESULTS
  In osteosarcoma, the mean microvessel count of VEGF strong-expression tumors was significantly higher than that of VEGF low-expression tumors (Wilcoxon rank sum test, P < 0.05). The close correlation was found between VEGF expression and microvessel density. In contrast, no association was found between Price's grade of osteosarcoma and VEGF expression, as well as microvessel density.
  
  
  CONCLUSIONS
  These observations suggest that VEGF is an important angiogenic factor in osteosarcoma.
authors.affiliation: Department of Orthopedic Surgery, PUMC Hospital, CAMS, PUMC, Beijing 100730, China. zhaoyupumch@hotmail.com
authors.forename: Y
authors.initials: Y
authors.lastname: Zhao
authors.forename: G X
authors.initials: GX
authors.lastname: Qiu
mesh_terms: D006801:Humans; D009367:Neoplasm Staging; D009389:Neovascularization, Pathologic / Q000473:pathology*; D012516:Osteosarcoma / Q000098:blood supply* / Q000378:metabolism / Q000473:pathology; D042461:Vascular Endothelial Growth Factor A / Q000096:biosynthesis*
chemical_list: D042461:Vascular Endothelial Growth Factor A