Abstract:
:Recent updated models of the coagulation mechanism suggest that factor VII/thromboplastin complex is the main initiator or trigger of coagulation. Factor VII activation of factor IX is likely to be an important activation pathway. Inhibition of factor VII by tissue factor pathway inhibitor may have a regulatory role in the initiation of coagulation. Defining factor VII's interactions in coagulation physiology may lead to answers for some clinical problems in both hemostasis and thrombosis. We describe a 15-year-old Chinese boy with factor VII deficiency and a factor VII level of 0.08 U/ml. His symptoms were recurrent epistaxis and moderate delayed bleeding post-dental extraction. Such specific symptoms have been reported previously in a study of 40 European patients. It is one diagnosis to consider if a patients main symptom is significant post-dental bleeding. It is possible that there is requirement for higher levels of factor VII at these anatomical sites making them the common sites for symptoms in patients with moderate deficiency. Case reports of rare clotting factor deficiencies will illustrate what may be important in vitro functions of clotting proteins. Therefore reporting should be encouraged, especially during review and reconsideration of models of the coagulation mechanism.
journal_name
Pathologyjournal_title
Pathologyauthors
Wei DC,Wong RW,Robertson EPdoi
10.1080/00313029700169954subject
Has Abstractpub_date
1997-05-01 00:00:00pages
234-7issue
2eissn
0031-3025issn
1465-3931journal_volume
29pub_type
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