title: Expression of vascular endothelial growth factor in basal cell carcinoma and cutaneous squamous cell carcinoma of the head and neck.
abstract: BACKGROUND
  Basal cell carcinomas (BCC) and squamous cell carcinomas (SCC) can both arise from any cutaneous epithelial surface. BCC are slow growing and rarely metastasise, whereas SCC are usually more aggressive. It is likely that the angiogenic process plays a key role in determining rate of growth and propensity for dissemination. Angiogenesis is a complex process requiring many factors and a pivotal group of proteins involved in this process is vascular endothelial growth factor (VEGF).
  
  
  METHODS
  Immunohistochemical expression of VEGF was assessed in 44 cases of BCC and 41 cases of cutaneous SCC from the head and neck region.
  
  
  RESULTS
  VEGF was expressed by blood vessel endothelial cells in both adjacent skin and tumour, and in the basal keratinocyte layer of epidermis. In BCC, VEGF was expressed by tumour epithelial cells, predominantly at the invasive tumour front, in 24/44 cases and its expression was significantly greater than in adjacent skin (p = 0.038). More widespread VEGF expression was found in 32/41 cases of SCC, and it was significantly associated with the degree of tumour differentiation (p < 0.001).
  
  
  CONCLUSIONS
  The patterns of VEGF expression in BCC and SCC may help to explain the different behaviour that is usually seen with these tumours.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Poole General Hospital, Poole, UK. jrbowden@doctors.org.uk
authors.forename: John
authors.initials: J
authors.lastname: Bowden
authors.forename: Peter A
authors.initials: PA
authors.lastname: Brennan
authors.forename: Tijjani
authors.initials: T
authors.lastname: Umar
authors.forename: Andrew
authors.initials: A
authors.lastname: Cronin
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D043925:Angiogenesis Inducing Agents / Q000378:metabolism*; D002280:Basal Cell Carcinoma / Q000378:metabolism* / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000378:metabolism* / Q000473:pathology; D006258:Head and Neck Neoplasms / Q000378:metabolism* / Q000473:pathology; D006801:Humans; D007124:Immunoenzyme Techniques; D008875:Middle Aged; D012878:Skin Neoplasms / Q000378:metabolism* / Q000473:pathology; D042461:Vascular Endothelial Growth Factor A
chemical_list: D043925:Angiogenesis Inducing Agents; C467484:VEGFA protein, human; D042461:Vascular Endothelial Growth Factor A