Hemophilia
Hemophilia is one of the severe, congenital hemorrhagic diatheses primarily affecting males. There are two types of hemophilia - hemophilia A (deficiency of factor VIII) and hemophilia B (deficiency of factor IX). The first type occurs in 80% of cases, while the second occurs in 20% of cases. Hemophilia is inherited as a recessive trait linked to the X chromosome. Both types of hemophilia have the same mode of inheritance and identical clinical manifestations. Differentiation between the types is carried out by analyzing the levels of clotting factors in plasma
Source: "MOSCOW CITY STANDARD OF TREATMENT FOR ADULTS (OVER 18 YEARS OLD) WITH HEMOPHILIA A AND B"
(approved by the Department of Health and RAMN GNC on 20.09.2004)