Mondo Description Hemophilia A is the most common form of hemophilia characterized by spontaneous or prolonged hemorrhages due to factor VIII deficiency.
Uniprot Description A disorder of blood coagulation characterized by a permanent tendency to hemorrhage. About 50% of patients have severe hemophilia resulting in frequent spontaneous bleeding into joints, muscles and internal organs. Less severe forms are characterized by bleeding after trauma or surgery.
Disease Ontology Description A X-linked recessive disease that has_material_basis_in Factor VIII deficiency, which results in the formation of fibrin deficient clots which makes coagulation much more prolonged.