Factor XI Deficiency

**Definition:** A hereditary deficiency of blood coagulation factor XI (also known as plasma thromboplastin antecedent or PTA or antihemophilic factor C) resulting in a systemic blood-clotting defect called hemophilia C or Rosenthal's syndrome, that may resemble classical hemophilia.

**Tree numbers:** - C15.378.100.100.325 - C15.378.100.141.325 - C15.378.463.325 - C16.320.099.325

**Synonyms:** - Deficiency, Factor Eleven - Factor 11 Deficiency - Factor Eleven Deficiency - Deficiency, Factor XI - Hemophilia C - Rosenthal's Syndrome - Rosenthal Syndrome - Deficiency, Factor 11 - Plasma Thromboplastin Antecedent Deficiency