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Vascular endothelial growth factor (VEGF) inhibitors have significantly improved outcomes in patients with advanced renal cell carcinoma (RCC). Multiple VEGF inhibiting orally administered tyrosine kinase inhibitors (TKIs) have been approved including sunitinib, sorafenib, pazopanib and most recently, axitinib. One VEGF inhibiting monoclonal antibody, bevacizumab, is approved in combination with interferon. However, these agents, besides the known progression-free survival benefits, are associated with a small but real risk of potentially life threatening and contrasting toxicities of thrombosis (both venous and arterial) and bleeding. Appropriate patient selection for VEGF inhibitors and prevention as well as prompt intervention to manage thrombosis and bleeding are necessary to forestall serious morbidities and mortality.
Texas Oncology, Houston, TX, USA.
This article was published in the following journal.
Name: Current oncology reports
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Agents acting to arrest the flow of blood. Absorbable hemostatics arrest bleeding either by the formation of an artificial clot or by providing a mechanical matrix that facilitates clotting when applied directly to the bleeding surface. These agents function more at the capillary level and are not effective at stemming arterial or venous bleeding under any significant intravascular pressure.
An anti-VEGF recombinant monoclonal antibody consisting of humanized murine antibody. It inhibits VEGF receptors and prevents the proliferation of blood vessels.
Spontaneous or near spontaneous bleeding caused by a defect in clotting mechanisms (BLOOD COAGULATION DISORDERS) or another abnormality causing a structural flaw in the blood vessels (HEMOSTATIC DISORDERS).
A dry artificial sterile sponge of fibrin prepared by clotting with thrombin a foam or solution of fibrinogen. It is used in conjunction with thrombin as a hemostatic in surgery at sites where bleeding cannot be controlled by more common methods. (From Martindale, The Extra Pharmacopoeia, 30th ed, p648)
A 180-kDa VEGF receptor found primarily in endothelial cells that is essential for vasculogenesis and vascular maintenance. It is also known as Flt-1 (fms-like tyrosine kinase receptor-1). A soluble, alternatively spliced isoform of the receptor may serve as a binding protein that regulates the availability of various ligands for VEGF receptor binding and signal transduction.
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