TY - CHAP M1 - Book, Section TI - Hereditary Thrombophilia A1 - Lichtman, Marshall A. A1 - Kaushansky, Kenneth A1 - Prchal, Josef T. A1 - Levi, Marcel M. A1 - Burns, Linda J. A1 - Linch, David C. Y1 - 2022 N1 - T2 - Williams Manual of Hematology, 10e AB - Risk factors for thromboembolism may be genetic or acquired (Table 89–1).Hereditary thrombophilia is a genetically determined increased risk of thrombosis. These same risk factors may predispose for complications of pregnancy (recurrent miscarriage, fetal death, etc.)Up to 50% of patients presenting with a first deep venous thrombosis will have an abnormal laboratory test suggesting a thrombophilic defect, and patients with recurrent thromboses or with a strong family history are even more likely to have laboratory evidence of a thrombophilic state (Table 89–1).Up to 16% of patients with thrombophilia have inherited more than one abnormality.These inherited defects also interact frequently with acquired risk factors, such as inactivity, trauma, malignancy, or oral contraceptive use, to lead to clinical thrombosis.There are several reasons tests for thrombophilia can be false positive, as listed in Table 89–2.The relative risks for venous thromboembolism, arterial thrombotic events, and pregnancy complications are summarized in Table 89–3. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/20 UR - hemonc.mhmedical.com/content.aspx?aid=1189336813 ER -