title: Assessment of vasa vasorum in the walls of thrombophlebitic saphenous vein.
abstract: OBJECTIVE
  The purpose of this study was to investigate the proliferation of vasa vasorum (VV) in the walls of thrombophlebitic saphenous vein (TSV), and to evaluate the influence of high venous pressure and lack of oxygen on the VV.
  
  
  METHODS
  The specimens of the great saphenous vein were collected: 11 primary varicose vein (PVV), 11 TSV and, as a control, eight normal great saphenous vein. Masson staining and immunohistochemistry for CD34 were used to observe the status of VV, and the number of VV were counted under light microscopy.
  
  
  RESULTS
  VV of the thrombophlebitic saphenous vein group (TSVG) were clustered together in adventitia, increased linearly in media, and scattered appearance in intima, were increased partially in intima of thrombus rupturing. In TSVG, the number of VV observed in adventitia, media and intima was 16.738±7.685, 4.845±2.537, 2.448±3.030, respectively. In the primary varicose vein group (PVVG), the corresponding values were 14.280±4.440, 2.965±1.125, 0.500±0.548. And the number was 8.911±2.629, 0.150±0.424, 0±0 in the control group (CG). Significantly higher numbers of VV were observed in the TSVG as compared to the PVVG or CG (P<0.05). No significant difference was observed between intima and media (P>0.05).
  
  
  CONCLUSIONS
  Thrombi in varicose veins can induce proliferation of VV, which may be involved in high venous pressure and hypoxia.
authors.affiliation: Center of General Surgery, The 89th Hospital of People's Liberation Army, Weifang, China. haibochuwf@163.com
authors.forename: H
authors.initials: H
authors.lastname: Chu
authors.forename: F
authors.initials: F
authors.lastname: Yan
authors.forename: J
authors.initials: J
authors.lastname: Zhao
authors.forename: Y
authors.initials: Y
authors.lastname: Xu
authors.forename: T
authors.initials: T
authors.lastname: Wang
authors.forename: K
authors.initials: K
authors.lastname: Li
authors.forename: J
authors.initials: J
authors.lastname: Tang
authors.forename: W
authors.initials: W
authors.lastname: Guo
mesh_terms: D000328:Adult; D018952:Antigens, CD34 / Q000032:analysis; D015415:Biomarkers / Q000032:analysis; D016022:Case-Control Studies; D049109:Cell Proliferation; D005260:Female; D006801:Humans; D000860:Hypoxia / Q000473:pathology; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D012501:Saphenous Vein / Q000737:chemistry / Q000473:pathology* / Q000503:physiopathology; D013924:Thrombophlebitis / Q000378:metabolism / Q000473:pathology* / Q000503:physiopathology; D014648:Varicose Veins / Q000378:metabolism / Q000473:pathology* / Q000503:physiopathology; D014651:Vasa Vasorum / Q000737:chemistry / Q000473:pathology*; D014690:Venous Pressure
chemical_list: D018952:Antigens, CD34; D015415:Biomarkers