title: Adipocyte morphometric evaluation and angiogenesis in the omentum transposed to the breast: a preliminary study.
abstract: OBJECTIVE
  The purpose of this study was to describe the probable mechanism of the volume increase of laparoscopically harvested omentum flaps used to treat breast deformities.
  
  
  METHODS
  A histological analysis of omentum samples was performed to study the volume increase of laparoscopically harvested omentum flaps. Samples were harvested immediately after the transposition of the omentum from the abdominal cavity to the breast region and during the second surgical procedure for breast symmetrization of eight patients submitted to the transposition of the omentum flap. Changes in the morphometric measurements of the adipocytes (perimeter, diameter, and area), microvascular density (as measured by the CD31 endothelial marker), and immunohistochemical expression of VEGF were documented.
  
  
  RESULTS
  The increases in adipocyte size and microvascular density were statistically significant (P < 0.012). The expression levels of VEGF were lower in the second set of samples when compared to the first set, but the differences were not statistically significant (P < 0.093).
  
  
  CONCLUSIONS
  These results demonstrate an increase in cellular volume as measured by adipocyte perimeter, diameter, and area. Moreover, the increase in the number of vessels in the second set of samples suggests that neoangiogenesis was stimulated by the initial increase in VEGF expression levels observed in the first set of samples. The increase in VEGF expression in the flap may have been caused by adipocyte hypertrophy resulting from neoangiogenesis.
authors.affiliation: Department of Surgery, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil. sirlei@sirleicosta.com.br
authors.forename: Sirlei Santos
authors.initials: SS
authors.lastname: Costa
authors.forename: Rosa Maria
authors.initials: RM
authors.lastname: Blotta
authors.forename: Luise
authors.initials: L
authors.lastname: Meurer
authors.forename: Maria Isabel Albano
authors.initials: MI
authors.lastname: Edelweiss
mesh_terms: D017667:Adipocytes / Q000166:cytology*; D000293:Adolescent; D000328:Adult; D015992:Body Mass Index; D001940:Breast / Q000098:blood supply / Q000254:growth & development* / Q000601:surgery; D001943:Breast Neoplasms / Q000098:blood supply / Q000473:pathology / Q000601:surgery*; D049108:Cell Enlargement; D005260:Female; D006801:Humans; D010535:Laparoscopy; D008875:Middle Aged; D018919:Neovascularization, Physiologic / Q000502:physiology; D009852:Omentum / Q000098:blood supply / Q000166:cytology / Q000637:transplantation*; D009929:Organ Size; D011184:Postoperative Period; D018709:Statistics, Nonparametric; D013524:Surgical Flaps / Q000098:blood supply / Q000473:pathology; D013997:Time Factors; D042442:Vascular Endothelial Growth Factors / Q000502:physiology*; D055815:Young Adult
chemical_list: D042442:Vascular Endothelial Growth Factors