Factor XI

**Definition:** Stable blood coagulation factor involved in the intrinsic pathway. The activated form XIa activates factor IX to IXa. Deficiency of factor XI is often called hemophilia C.

**Tree numbers:** - D08.622.490 - D12.776.124.125.425 - D12.776.811.243.490 - D23.119.425

**Synonyms:** - Factor 11 - Factor Eleven - Plasma Thromboplastin Antecedent - Coagulation Factor XI - Blood Coagulation Factor XI