Hemophilia

Hemophilia is an inherited bleeding disorder which is X-linked recessive and therefore occurs almost exclusively in males. There are two subtypes - hemophilia A (80%) and hemophilia B (20%). 

The incidence of hemophilia A is around 1 in 5000 male births, and the incidence of hemophilia B is around 1 in 25,000-30,000 male births. 

Most patients present with bleeding during the neonatal period or with bleeding / large hematoma following minor trauma as a toddler. Hemophilia A and B are difficult to delineate clinically 6.

Hemophilia is an inheritable X-linked recessive disease 6, with 70% considered familial and 30% considered sporadic 8. It occurs when there is a mutation of the F8 or F9 gene, causing hemophilia A or B respectively, on the long-arm of the X-chromosome 7

  • 80% of cases
  • F8 gene mutation
  • coagulation factor VIII deficiency or absence
  • one-third have no family history
  • a.k.a. Christmas disease
  • 20% of cases
  • F9 gene mutation
  • coagulation factor IX deficiency or absence
  • ~70% of patients have the severe form of the disease characterized by spontaneous hemorrhage or hemorrhage following minor trauma 1 

Transfusion-related diseases associated with the treatment of hemophilia include:

The hallmark of the disease is hemorrhage, particularly into joints and/or soft-tissue, with three main radiological consequences:

  • haemophilic arthropathy occurring in almost all individuals
  • haemophilic pseudotumour occurring in ~2%
  • soft tissue hematoma formation may lead to contractures 3
  • serious life-threatening hemorrhage (intracranial, thoracic, abdominal)

Treatment depends on the type, general severity and current clinical state. Factor VIII and IX blood product concentrate and recombinant factors can be used. 

Prognosis depends on the severity and on the presence or absence of transfusion-related disease. HIV is a leading cause of death. Life expectancy in those without HIV is ~62 years 2.

  • ~15 times increased risk death from intracranial hemorrhage (~1/3 of all deaths)
  • ~50 times increased risk death from non-intracranial hemorrhage
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Article information

rID: 9383
Synonyms or Alternate Spellings:
  • Hemophilia
  • Haemophilia
  • Haemophilia A
  • Haemophilia B
  • Hemophilia A
  • Hemophilia B
  • Christmas disease

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Cases and figures

  • Case 1 - T1 C+ FS
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  • Case 2
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  • Case 2
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  • Case 3
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  • Case 3
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  • Case 4
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  • Case 5 - with renal hemorrhage
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  • Case 6 - elbow haemophilic arthropathy
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