haemophilia b
Definition
Noun: A hereditary blood coagulation disorder characterized by a deficiency of clotting factor IX, resulting in a tendency to bleed excessively, especially into joints and muscles. It is one of the two main forms of hemophilia, is inherited in an X-linked recessive pattern, and primarily affects males.
Usage
This is a medical term used in clinical, scientific, and patient education contexts. It is often used interchangeably with "Christmas disease" or "factor IX deficiency." * The patient was diagnosed with haemophilia B after presenting with prolonged bleeding following a minor injury. * Treatment for haemophilia B typically involves intravenous infusions of factor IX concentrate.
Advanced Usage
- Genetic Basis: The term is used when discussing the genetic mutation on the X chromosome that leads to the production of defective or insufficient factor IX.
- The study focused on identifying new mutations responsible for haemophilia B.
- Clinical Severity: The term is often modified to indicate the severity of the condition (e.g., mild, moderate, or severe haemophilia B), which correlates with the level of functional factor IX in the blood.
- He manages his mild haemophilia B with treatment only prior to surgical procedures.
Variants and Related Words
- Christmas disease: A synonym for haemophilia B, named after Stephen Christmas, the first patient described with this condition.
- Factor IX deficiency: A descriptive synonym focusing on the specific protein that is lacking.
- Hemophilia B: The American English spelling variant.
- Haemophilia A: The related but distinct disorder caused by a deficiency of clotting factor VIII.
Synonyms
- Christmas disease
- Factor IX deficiency
- Hemophilia B (US spelling)
Related Terms and Concepts
- Coagulopathy: A general term for any disorder of blood coagulation.
- X-linked recessive: The pattern of inheritance for haemophilia B.
- Hemarthrosis: Bleeding into a joint, a common complication.
- Prophylaxis: Preventive treatment, often used in managing severe cases.
Noun
-
a clotting disorder similar to hemophilia A but caused by a congenital deficiency of factor IX
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