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Pathology - Thrombophilia
Definition • An hereditary susceptibility to venous thrombosis.
Exposition • Recurrent deep vein thrombosis or pulmonary embolism. Venous thrombosis may also manifest at atypical locations, such as the axillary or cerebral veins.
Resistance to activated protein C
The predominant kind of thrombophilia, impacting 5–10% of the population. • Resulting from a point mutation in the factor V gene, referred to as the factor V Leiden mutation. Factor V Leiden protein exhibits typical procoagulant activity; however, it is not appropriately controlled by activated protein C, leading to a predisposition to thrombosis.
Prothrombin G20210A mutation
• Impacts around 1–5% of the population. • Resulting from a single nucleotide substitution of guanine for adenine at position 20210 of the PT gene. • Correlated with heightened PT levels and an augmented risk of venous thrombosis, potentially attributable to elevated thrombin production, excessive fibrin clot proliferation, and possibly enhanced platelet activation.
Deficiency of Protein C and S
• Impacts approximately 0.2% of the population. Protein C and S are endogenous anticoagulants that inactivate coagulation factors and regulate proper hemostasis. Deficiencies in these proteins thus predispose individuals to thrombosis.
Definition • An hereditary susceptibility to venous thrombosis.
Exposition • Recurrent deep vein thrombosis or pulmonary embolism. Venous thrombosis may also manifest at atypical locations, such as the axillary or cerebral veins.
Resistance to activated protein C
The predominant kind of thrombophilia, impacting 5–10% of the population. • Resulting from a point mutation in the factor V gene, referred to as the factor V Leiden mutation. Factor V Leiden protein exhibits typical procoagulant activity; however, it is not appropriately controlled by activated protein C, leading to a predisposition to thrombosis.
Prothrombin G20210A mutation
• Impacts around 1–5% of the population. • Resulting from a single nucleotide substitution of guanine for adenine at position 20210 of the PT gene. • Correlated with heightened PT levels and an augmented risk of venous thrombosis, potentially attributable to elevated thrombin production, excessive fibrin clot proliferation, and possibly enhanced platelet activation.
Deficiency of Protein C and S
• Impacts approximately 0.2% of the population. Protein C and S are endogenous anticoagulants that inactivate coagulation factors and regulate proper hemostasis. Deficiencies in these proteins thus predispose individuals to thrombosis.
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