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- W2000748507 abstract "Recent reports indicate that patients infected with HIV are at increased risk for the development of thrombosis. Among other possibilities, an acquired deficiency of protein S (PS), one of the plasma's natural anticoagulants, might explain this tendency. PS deficiency can be classified in three types depending on the levels of total and free protein (antigenic assays) as well as anticoagulant activity (functional assay). Although the prevalence of inherited PS deficiency is not known because of its rarity, several conditions can lead to acquired forms of the disease. We report two AIDS patients with coexistent type III PS deficiency and thrombosis. Our first patient presented with bilateral chronic leg ulcers and a skin biopsy revealed dermal microthromboses. On laboratory evaluation he had PS deficiency and was started on anticoagulation, but was lost to follow-up. The second patient presented with hepatic vein thrombosis (Budd–Chiari syndrome) and was also PS deficient. On long-term anticoagulation, she experienced resolution of the thrombosis. Neither patient had prior personal or family history of venous thrombosis, nor acquired risk factors such as immobility, acute infection, recent surgery, or hormonal therapy. The literature contains a few reports of skin ulcers and Budd–Chiari syndrome associated with PS deficiency, although none in AIDS patients. While a larger number of studies describe an association between PS deficiency and HIV infection, the causal effect of this deficiency on the thrombophilic tendency in AIDS has not been established. We propose that awareness of the increased risk for thrombosis in HIV infection is important to the understanding of disease pathophysiology and management of these patients." @default.
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- W2000748507 date "2005-09-01" @default.
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- W2000748507 title "Unusual Thromboses Associated with Protein S Deficiency in Patients with Acquired Immunodeficiency Syndrome: Case Reports and Review of the Literature" @default.
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- W2000748507 doi "https://doi.org/10.1089/aid.2005.21.753" @default.
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