A 6-year-old boy with a family history of bleeding disorders presents with epistaxis and excessive bleeding after a minor laceration to his lip. Laboratory studies reveal a normal PT, prolonged aPTT, and normal platelet count. A factor assay shows 35% factor VIII activity. Which of the following is the most likely diagnosis?
- A)Hemophilia B
- B)von Willebrand disease
- C)Factor V deficiency
- D)Vitamin K deficiency
- E)Hemophilia AGABARITO
Explicação
Hemophilia A is an X-linked deficiency of factor VIII. It presents with prolonged aPTT, normal PT, normal platelets, and low factor VIII activity. The male gender and family history support this diagnosis. Ver explicação completa e trilha adaptativa →