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Living with Bleeding diathesis due to thromboxane synthesis deficiency

A rare genetic bleeding condition in which platelets don't clump well, causing easy bruising and nosebleeds.

Understanding Bleeding diathesis due to thromboxane synthesis deficiency

Bleeding diathesis due to thromboxane synthesis deficiency is a rare genetic condition in which platelets (blood cells that help clotting) do not clump together well.

It causes mild to moderate bleeding from the skin and linings of the body, the gut, or during surgery. Examples are easy bruising, long nosebleeds, and heavy bleeding after a tooth is pulled.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Nosebleeds
  • Easy bruising
  • Large bruises (ecchymosis)
  • Platelets that do not clump normally

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include blood and bone marrow specialists and genetic specialists.

  3. Consider genetic testing

    Changes in TBXA2R are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

Care & treatment

Care team
Blood and bone marrow specialists (hematologists); Genetic specialists (geneticists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with rare disease patient organizations for support
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Can TBXA2R gene testing confirm the diagnosis?
What should I do before surgery or dental work?
Are there medicines I should avoid because they affect bleeding?

Quick facts

InheritanceAutosomal Dominant
GenesTBXA2R

Changes in the TBXA2R gene cause this condition. It is autosomal dominant, so one changed copy of the gene is enough.

GeneticBlood

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Bleeding diathesis due to thromboxane synthesis deficiencyGARD ID 17132 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

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