Congenital Risk Factors
First episode present by age 20
Features:
Thrombosis in unusual sites:
mesentery
Family history of thrombotic episodes
cerebral
May recur in noncontiguous sites
Axillary veins
Antithrombin deficiencies
Protein C & Protein S deficiencies
Disorders:
APC resistance – Factor V Leiden
Prothrombin 20210A gene mutation
Dys & hyperfibrinogenemia
Plasminogen mutations
TPA deficiencies
PAI-1 increases