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What is hemophilia a?

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Hemophilia A, also called factor VIII (FVIII) deficiency or classic hemophilia, is a genetic disorder caused by missing or defective factor VIII, a clotting protein. Although it is passed down from parents to children, about 1/3 of cases are caused by a spontaneous mutation, a change in a gene. read more

Hemophilia is a rare, inherited bleeding disorder in which blood cannot clot (form a mass) normally at the site of a wound or injury. The disorder occurs because certain blood clotting factors are missing or do not work properly. read more

Hemophilia (heem-o-FILL-ee-ah) is a rare bleeding disorder in which the blood doesn't clot normally. If you have hemophilia, you may bleed for a longer time than others after an injury. You also may bleed inside your body (internally), especially in your knees, ankles, and elbows. read more

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