UNLABELLED Inherited thrombophilia can be defined as a predisposition to thrombosis caused by heritable defects, such as mutations in genes encoding the natural anticoagulants or clotting factors. Pregnancy related risk of VTE is sixfold increased comparing to non pregnant age matched women. Pregnancy is an independent risk factor for the development of venous thromboembolism and this risk is f...

Inherited resistance to activated protein C (APC), which is caused by a single point mutation in the gene for factor V, is a common risk factor for thrombosis. In this study, the prevalence of APC resistance in 18 unrelated thrombosis-prone families with inherited protein S deficiency was investigated to determine its role as additional genetic risk factor for thrombosis. In addition, a detaile...

BACKGROUND AND PURPOSE Inherited protein S deficiency has been associated with an increased risk of thromboembolic disease. It is possible that such a coagulopathy could predispose children to the development of strokes by permitting clot formation in response to stimuli that ordinarily would be insufficient to cause thrombus formation. CASE DESCRIPTION We evaluated a previously well 4-year-o...

CONTEXT Retinal vein thrombosis is most common in old people, and is often associated with systemic vascular disease. One of its rare systemic causes is protein S deficiency. CASE REPORT A case of a 21-year-old woman with retinal vein prethrombosis associated only with protein S deficiency is described. She presented with acutely reduced visual acuity and a central scotoma in her left eye. Wa...

To assess current laboratory practice and the performance of different reagent-instrument combinations for protein S testing, protein S results from the North American Specialized Coagulation Laboratory Association (NASCOLA) proficiency testing surveys for 2002 and the first half of 2003 were analyzed. A written survey of NASCOLA laboratories also was performed to further assess current laborat...

Protein S deficiency is a recognized risk factor for venous thrombosis. Of all the inherited thrombophilic conditions, it remains the most difficult to diagnose because of phenotypic variability, which can lead to inconclusive results. We have overcome this problem by studying a cohort of patients from a single center where the diagnosis was confirmed at the genetic level. Twenty-eight index pa...

Neonatal purpura fulminans is a rare and life threatening disease that can be inherited or acquired in etiology. It manifests as DIC and extensive subcutaneous thrombosis. The condition is often fatal unless there is prompt diagnosis, and judicious therapy. The most important causes of this condition are infections and congenital deficiency of anticoagulant proteins C and S.In the case of PC (p...

neonatal purpura fulminans is a rare and life threatening disease that can be inherited or acquired in etiology. it manifests as dic and extensive subcutaneous thrombosis. the condition is often fatal unless there is prompt diagnosis, and judicious therapy. the most important causes of this condition are infections and congenital deficiency of anticoagulant proteins c and s.in the case of pc (p...