title: Early hemostatic alterations following bone marrow transplantation: a prospective study.
abstract: BACKGROUND
  The occurrence of coagulation system alterations after bone marrow transplantation (BMT) and their possible role in the pathogenesis of thrombotic complications such as veno-occlusive disease of the liver (VOD) are still a matter of debate. The aim of this study was to evaluate prospectively the alterations in hemostatic balance developing during the early period after BMT (up to day +21) and their relationships (if any) with VOD.
  
  
  RESULTS
  Twenty-nine patients (15 autologous and 14 allogeneic BMT) entered the study. No patient suffered from thrombotic and/or major hemorrhagic events. Since there were no differences between the two groups of patients with regard to modifications of coagulation parameters, they were considered together for the purposes of the study. We observed a progressive increase from baseline levels of fibrinogen, factor VIII activity (fVIII:C) and von Willebrand factor antigen (vWf), while factor VII antigen (fVIIAg), protein C and plasminogen significantly decreased. The alterations in these test values were maximal on day +14, with a trend towards normal levels one week later. There was no modification of PT, PTT, prothrombin fragment 1 + 2 (F 1 + 2), fXIIC, tPA, PAI-1, D dimer or protein S levels; serum levels of tumor necrosis factor-alpha were also unchanged.
  
  
  CONCLUSIONS
  These results suggest that some alterations of the hemostatic system, probably a consequence of endothelial damage, can be detected early after BMT, but their clinical significance remains uncertain due to the lack of a correlation between hemostatic test alterations and the occurrence of thrombotic complications.
authors.affiliation: Bone Marrow Transplant Unit, University of Florence, Careggi Hospital, Italy.
authors.forename: A M
authors.initials: AM
authors.lastname: Vannucchi
authors.forename: D
authors.initials: D
authors.lastname: Rafanelli
authors.forename: G
authors.initials: G
authors.lastname: Longo
authors.forename: A
authors.initials: A
authors.lastname: Bosi
authors.forename: S
authors.initials: S
authors.lastname: Guidi
authors.forename: R
authors.initials: R
authors.lastname: Saccardi
authors.forename: E
authors.initials: E
authors.lastname: Filimberti
authors.forename: S
authors.initials: S
authors.lastname: Cinotti
authors.forename: A
authors.initials: A
authors.lastname: Grossi
authors.forename: M
authors.initials: M
authors.lastname: Morfini
mesh_terms: D000293:Adolescent; D000328:Adult; D001778:Blood Coagulation Disorders / Q000209:etiology*; D001779:Blood Coagulation Factors / Q000032:analysis; D016026:Bone Marrow Transplantation / Q000009:adverse effects*; D005260:Female; D006504:Hepatic Veno-Occlusive Disease / Q000209:etiology; D006801:Humans; D007938:Leukemia / Q000628:therapy; D008223:Lymphoma / Q000628:therapy; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies
chemical_list: D001779:Blood Coagulation Factors