1,721,028 research outputs found
Disordini congeniti rari dei fattori della coagulazione
No full textDisordini congeniti rari dei fattori della coagulazion
Sensitivity of two commercial reagents for prothrombin time and activated partial thromboplastin time to isolate coagulation factor deficiencies
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Pathogenesis, clinical and laboratory aspects of thrombosis in cancer. [Review]
No full textThe relationship between increased clotting and malignancy is well recognized, though the bidirectional development of this association is often overlooked. In the challenging cancer biology, transforming genes often act in concert with numerous epigenetic factors, including hypoxia, inflammation, contact between blood and cancer cells, and emission of procoagulant vesicles from tumors, to determine a net imbalance of the hemostatic potential which is detectable by a variety of laboratory tests. Procoagulant factors, in particular, are intimately involved in all aspects of hemostatic, cell proliferation and cellular signalling systems. However, the biggest as yet unresolved question is why cancer patients develop thrombosis? Since the thrombus itself does not apparently contributes directly to the tumor biology, enhanced hemostasis activation in cancer patients may be interpreted according to the most recent biological evidences. Coagulation and cancer biology interact bidirectionally in a 'vicious cycle', in which greater tumor burden supplies greater procoagulants (tissue factor, cancer procoagulant) and thrombin, which would in turn act as strong promoters of cancer growth and spread. In this perspective, thrombosis may be interpreted as a epiphenomenon of an intricate an effective biological feedback to maintain or promote cancer progression. In this review article, we briefly analyze the pathogenesis, laboratory, clinical and therapeutic features of cancer and thrombosis. © Springer Science+Business Media, LLC 2007
Thyroid dysfunction and haemostasis: an issue still unresolved.
No full textThyroid hormones exert various effects on the hemostatic system, as documented by the fact that subclinical or overt thyroid dysfunctions may be associated with hypocoagulable or hypercoagulable states. In this review, the hemostatic balance (primary hemostasis, coagulation factors, and fibrinolytic system) in different thyroid disorders is analyzed from a laboratory, pathogenic, and clinical point of view. Although limited, the published studies suggest that patients with hyperthyroidism or subclinical hypothyroidism have an increased thrombotic risk, whereas patients with overt hypothyroidism have a bleeding tendency. Further trials on larger series of patients are needed to confirm these preliminary findings and to elucidate the pathogenic mechanisms regulating the complex interaction between thyroid disorders and hemostasis. Copyright © 2009 by Thieme Medical Publishers, Inc
Acquired factor VIII inhibitors in oncohematology: a systematic review.
No full textAcquired hemophilia A is an uncommon but potentially life-threatening hemorrhagic disorder caused by the onset of autoantibodies against coagulation factor VIII. Acquired hemophilia A is most frequently associated with autoimmune diseases, neoplasia, pregnancy and drug reactions but in approximately 50% of the cases no underlying disorder can be identified. A prompt diagnosis of this acquired bleeding disorder is essential for the appropriate management which is aimed to the control of hemorrhage and the suppression of inhibitor. Based on electronic and hand searches of the published literature, this systematic review examines the current knowledge on factor VIII autoantibodies associated with oncohematological disorders. © 2008 Elsevier Ireland Ltd. All rights reserved
Prothrombotic effects and clinical implications of third-generation oral contraceptives use
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