Hemophilia A and B:
Chapter: 20a
X-linked recessive bleeding disorders caused by deficiency of either factor VIII (hemophilia A) of factor IX (hemophilia B). Typical clinical features include hemarthrosis, hematomas, ecchymosis, mucosal bleeding (e.g., epistaxis), and intracranial bleeding. Typical laboratory features include a prolonged partial thromboplastin time.
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