hemophilia

An X-linked recessive genetic disease, caused by a mutation in the gene for clotting factor VIII (hemophilia A) or clotting factor IX (hemophilia B), which leads to abnormal blood clotting.

See: haemophilia.

Group of hereditary disorders in which affected individuals fail to make enough of certain proteins needed to form blood clots.

A sex-linked inherited bleeding disorder that generally only affects males. The disorder is characterized by a tendency to bleed spontaneously or at the slightest injury because of the lack of certain clotting factors in the blood. See also inherited, protein, sex-linked