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Factor X deficiency (X as Roman numeral ten) is a bleeding disorder characterized by a lack in the production of factor X (FX), an enzyme protein that causes blood to clot in the coagulation cascade. Produced in the liver FX when activated cleaves prothrombin to generate thrombin in the intrinsic pathway of coagulation.
Inborn deficiency of factor X is very rare (1:1,000,000), and may present with epistaxis (nosebleeds), hemarthrosis (bleeding into joints) and gastrointestinal blood loss. . Apart from congenital deficiency, low factor X levels may occur occasionally in a number of disease stat
Scott syndrome is a rare congenital bleeding disorder that is due to a defect in a platelet mechanism required for blood coagulation. [1]Normally when a vascular injury occurs (i.e., a cut, scrape or other injury that causes bleeding), platelets are activated and phosphatidylserine (PS) in the inner leaflet of the platelet membrane is transported to the outer leaflet of the platelet membrane ...
Haemophilia A is a recessive X-linked genetic disorder resulting in a deficiency of functional clotting Factor VIII. [39] Haemophilia B is also a recessive X-linked genetic disorder involving a lack of functional clotting Factor IX. [42] Haemophilia C is an autosomal genetic disorder involving a lack of functional clotting Factor XI.
2152 14066 Ensembl ENSG00000117525 ENSMUSG00000028128 UniProt P13726 P20352 RefSeq (mRNA) NM_001993 NM_001178096 NM_010171 RefSeq (protein) NP_001171567 NP_001984 NP_034301 Location (UCSC) Chr 1: 94.53 – 94.54 Mb Chr 3: 121.52 – 121.53 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Tissue factor, also called platelet tissue factor or Coagulation factor III, is a protein present ...
If a coagulation factor is part of the contact activation or tissue factor pathway, a deficiency of that factor will affect only one of the tests: Thus hemophilia A, a deficiency of factor VIII, which is part of the contact activation pathway, results in an abnormally prolonged aPTT test but a normal PT test. Deficiencies of common pathway ...
Fibrinogen is a glycoprotein made and secreted into the blood primarily by liver hepatocyte cells. Endothelium cells also make what appears to be small amounts of fibrinogen but this fibrinogen has not been fully characterized; blood platelets and their precursors, bone marrow megakaryocytes, although once thought to make fibrinogen, are now known to take up and store but not make the ...
High platelet counts can occur in patients with polycythemia vera (high red blood cell counts), and is an additional risk factor for complications. [ citation needed ] A very small number of people report symptoms of erythromelalgia , a burning sensation and redness of the extremities that resolves with cooling, or aspirin or both.