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Diseases » Hemophilia B » Summary

What is Hemophilia B?

What is Hemophilia B?

  • Hemophilia B: A rare coagulation disorder caused by a deficiency of factor IX which results in bleeding problems.
  • Hemophilia B: A deficiency of blood coagulation factor IX inherited as an X-linked disorder. (Also known as Christmas Disease, after the first patient studied in detail, not the holy day.) Historical and clinical features resemble those in classic hemophilia (HEMOPHILIA A), but patients present with fewer symptoms. Severity of bleeding is usually similar in members of a single family. Many patients are asymptomatic until the hemostatic system is stressed by surgery or trauma. Treatment is similar to that for hemophilia A. (From Cecil Textbook of Medicine, 19th ed, p1008)
    Source - Diseases Database

Hemophilia B is listed as a "rare disease" by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH). This means that Hemophilia B, or a subtype of Hemophilia B, affects less than 200,000 people in the US population.
Source - National Institutes of Health (NIH)

Hemophilia B: Introduction

Types of Hemophilia B:

Broader types of Hemophilia B:

Who gets Hemophilia B?

Gender Ratio for Hemophilia B: high male predominance

How serious is Hemophilia B?

Complications of Hemophilia B: see complications of Hemophilia B

What causes Hemophilia B?

Causes of Hemophilia B: see causes of Hemophilia B

What are the symptoms of Hemophilia B?

Symptoms of Hemophilia B: see symptoms of Hemophilia B

Complications of Hemophilia B: see complications of Hemophilia B

Can anyone else get Hemophilia B?

More information: see contagiousness of Hemophilia B
Inheritance: see inheritance of Hemophilia B

Hemophilia B: Testing

Diagnostic testing: see tests for Hemophilia B.

Misdiagnosis: see misdiagnosis and Hemophilia B.

How is it treated?

Doctors and Medical Specialists for Hemophilia B: Hematologist ; see also doctors and medical specialists for Hemophilia B.
Treatments for Hemophilia B: see treatments for Hemophilia B
Research for Hemophilia B: see research for Hemophilia B

Name and Aliases of Hemophilia B

Main name of condition: Hemophilia B

Other names or spellings for Hemophilia B:

Christmas disease, Factor IX deficiency, plasma thromboplastin component deficiency, HEM B

Hereditary factor IX deficiency, Haemophilia type B, Christmas disease Source - Diseases Database

Christmas disease, Factor IX deficiency, HEM B
Source - Office of Rare Diseases (ORD) of the National Institutes of Health (NIH)

Hemophilia B: Related Conditions

Research the causes of these diseases that are similar to, or related to, Hemophilia B:


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