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InsightHorizon Digest

What is the difference of hemophilia A and B

Author

Isabella Harris

Updated on April 16, 2026

Haemophilia can be defined as a bleeding disorder that is caused by the deficiency of the clotting factors

Whats the difference between hemophilia A B and C?

The three main forms of hemophilia include the following: Hemophilia A: Caused by a lack of the blood clotting factor VIII; approximately 85% of hemophiliacs have type A disease. Hemophilia B: Caused by a deficiency of factor IX. Hemophilia C: Some doctors use this term to refer to a lack of clotting factor XI.

What is Type A hemophilia?

Hemophilia A, also called factor VIII (8) deficiency or classic hemophilia, is a genetic disorder caused by missing or defective factor VIII (FVIII), a clotting protein. Although it is passed down from parents to children, about 1/3 of cases found have no previous family history.

What is more common haemophilia A or B?

Hemophilia A and B are rare X-linked bleeding disorders caused by mutations in the genes encoding coagulation factor VIII (FVIII) and factor IX (FIX). Hemophilia A (HA) is more common than hemophilia B (HB), with a prevalence of one in 5,000 male live births compared to one in 30,000, respectively.

Why Hemophilia B is called Christmas disease?

Hemophilia B is also known as Christmas disease. It is named after the first person to be diagnosed with the disorder in 1952, Stephen Christmas. As the second most common type of hemophilia, it occurs in about 1 in 25,000 male births and affects about 4,000 individuals in the United States.

What disease is called Christmas?

Hemophilia B is the second most common type of hemophilia. 1,2. It is also known as factor IX deficiency, or Christmas disease. It was originally named “Christmas disease” after the first person diagnosed with the disorder back in 1952.

How common is hemophilia B?

Hemophilia B occurs in approximately 1 in 25,000 male births. It is less prevalent than hemophilia A which occurs in approximately 1 in 5,000 male births.

Can you have both haemophilia A and B?

This is more common with severe haemophilia, and is more common with haemophilia A than haemophilia B. These antibodies are called ‘inhibitors’, and treatments are available to try to eradicate these antibodies. Inhibitor risk is known to be linked to various gene variants in both haemophilia A and B.

Do females get hemophilia?

Hemophilia can affect women, too When a female has hemophilia, both X chromosomes are affected or one is affected and the other is missing or non-functioning. In these females, bleeding symptoms can be similar to males with hemophilia. When a female has one affected X chromosome, she is a “carrier” of hemophilia.

How do you get hemophilia B?

Hemophilia B is caused by an inherited X-linked recessive trait, with the defective gene located on the X chromosome. Females have two copies of the X chromosome. If the factor IX gene on one chromosome does not work, the gene on the other chromosome can do the job of making enough factor IX.

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What are the two types of hemophilia?

  • Hemophilia A (Classic Hemophilia) This type is caused by a lack or decrease of clotting factor VIII.
  • Hemophilia B (Christmas Disease) This type is caused by a lack or decrease of clotting factor IX.

What race is most affected by hemophilia?

The average age of persons with hemophilia in the United States is 23.5 years. Compared to the distribution of race and ethnicity in the U.S. population, white race is more common, Hispanic ethnicity is equally common, while black race and Asian ancestry are less common among persons with hemophilia.

Can hemophilia B be cured?

There is currently no cure for hemophilia. Effective treatments do exist, but they are expensive and involve lifelong injections several times per week to prevent bleeding.

Which queen had hemophilia?

Queen Victoria of England, who ruled from 1837-1901, is believed to have been the carrier of hemophilia B, or factor IX deficiency. She passed the trait on to three of her nine children. Her son Leopold died of a hemorrhage after a fall when he was 30.

How do you treat hemophilia B?

The most common treatment for hemophilia B is called replacement therapy. Concentrates of clotting factor IX are the foundation of this treatment for hemophilia B and are administered as an infusion to help replace the clotting factor that’s missing or low in the blood.

What is the prognosis of hemophilia B?

Many patients still die before adulthood due to inadequate treatment. With proper treatment, life expectancy is only about 10 years less than healthy men. Overall, the death rate for people with hemophilia is about twice that of the rate for healthy men. For severe hemophilia, the rate is four to six times higher.

Where is the F9 gene located?

In human, the F9 gene is located on the X chromosome at position q27. 1.

What is Factor 8 called?

Factor VIII (FVIII) is an essential blood-clotting protein, also known as anti-hemophilic factor (AHF). In humans, factor VIII is encoded by the F8 gene. Defects in this gene result in hemophilia A, a recessive X-linked coagulation disorder.

Is von Willebrand a disease?

Von Willebrand disease (VWD) is a blood disorder in which the blood does not clot properly. Blood contains many proteins that help the blood clot when needed. One of these proteins is called von Willebrand factor (VWF).

Can you donate blood if you have hemophilia?

Because of the risk of bleeding, many blood collection centers turn away donors with hemophilia. Other centers turn away anyone who has ever received factor concentrate because of the risk of virus contamination. Maybe most importantly, you shouldn’t donate blood because you need to protect your veins.

Can a hemophiliac have a baby?

A pregnant woman who is a hemophilia carrier has special concerns. For example, her child could be born with hemophilia, so she should know how to manage it. She could give birth to a daughter who is a carrier. Female carriers may also face bleeding complications, especially after delivery.

Can hemophiliacs have babies?

If the mother is a hemophilia carrier, there is a chance that the baby will be born with hemophilia. In families with a known history of hemophilia, or in those with a prenatal genetic diagnosis of hemophilia, one can plan special testing for hemophilia before the baby’s delivery.

What is Hemophilia article?

Hemophilia is a rare condition in which the blood does not clot properly. It mostly affects men. Proteins called clotting factors work with platelets to stop bleeding at the site of an injury. People with hemophilia produce lower amounts of either Factor VIII or Factor IX than those without the condition.

What is Hemophilia C caused by?

Hemophilia C, also known as Rosenthal syndrome, is caused by low levels of factor XI (11), another blood protein required to make a blood clot. Although associated with bleeding, hemophilia C differs from hemophilia A and B in cause and bleeding tendency.

Why do men only get hemophilia?

X-linked disorders are associated with mutations on the X-chromosome. These disorders affect males more often than females because females have an additional X chromosome that acts as a “back-up.” Because males only have one X chromosome, any mutation in the factor VIII or IX gene will result in hemophilia.

Does the royal family still have hemophilia?

Today. No living member of the present or past reigning dynasties of Europe is known to have symptoms of haemophilia or is believed to carry the gene for it.

Does vitamin K help hemophilia?

Although the UKHCDO recommends oral vitamin K for newborns with hemophilia, parenteral vitamin K is preferred in general and has not been demonstrated to cause significant bleeding complications in newborns with hemophilia. Parenteral vitamin K is therefore an option for newborns with hemophilia.

What famous person has hemophilia?

The love of Elizabeth Taylor’s life and a Shakespearean actor for the ages, Richard Burton starred in 61 films and 30 plays — and was the first Hollywood star to reveal he had hemophilia. In fact, Burton and Taylor set up the Richard Burton Hemophilia Fund in 1964 to help find a cure for hemophilia.

Can hemophiliacs get tattoos?

Some care providers refuse to work with hemophilia patients who want tattoos, referring to those situations as unnecessary harm done to the patients’ bodies. Other care providers caution patients to get tattoos at their own risk. And some providers will work with their patients to ensure a safe tattooing experience.

Is there a cure to hemophilia 2020?

There’s no cure for hemophilia, but scientists are making progress. They’re coming up with ways to put healthy genes into the cells of people with hemophilia so their blood clots normally. Hemophilia has no cure (yet), but changes are on the way. Gene therapy is a one-time treatment that’s very promising.

Can blood thinners cause hemophilia?

Treatments with anti-coagulation drugs such as Brilinta (ticagrelor) may trigger acquired Hemophilia A (AHA) in adults. This finding was reported by Italian doctors after a patient on Brilinta was hospitalized with a hemorrhage.