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Living with Gray platelet syndrome

A bleeding disorder with abnormal platelets, causing easy bruising, nosebleeds, and bone marrow scarring.

Understanding Gray platelet syndrome

Gray platelet syndrome is a bleeding disorder linked to abnormal platelets, the small blood cells that help blood clot.

People tend to bruise easily and have more nosebleeds, and may bleed heavily or for a long time after surgery, dental work, or minor injury. Women often have irregular, heavy periods. These bleeding problems are usually mild to moderate. Another common feature is myelofibrosis, scarring in the bone marrow that keeps it from making enough blood cells and can lead to an enlarged spleen. It is usually noticed in childhood.

Signs & symptoms

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

  • Easy bruising
  • Frequent nosebleeds
  • Abnormal bleeding after surgery or dental work
  • Heavy, irregular periods
  • Enlarged spleen
  • Low platelet count

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 NBEAL2 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 Platelet Disorder Support Association
  • 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 genetic testing confirm a change in the NBEAL2 gene?
What should I do before surgery or dental work?
How should my bone marrow and spleen be monitored?

Quick facts

Symptoms usually startChild
InheritanceAutosomal Dominant, Autosomal Recessive
GenesNBEAL2

Changes in the NBEAL2 gene cause this condition. GARD lists both autosomal recessive and autosomal dominant inheritance.

GeneticBlood

Also known as: alpha storage pool deficiency; bdplt4; bleeding disorder, platelet-type, 4; deficient alpha granule syndrome; gps; platelet alpha granule deficiency

Patient organizations

Source: NIH GARD · Gray platelet syndromeGARD ID 2562 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Gray platelet syndrome.

Explore the Gray platelet syndrome blog

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  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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