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Living with Platelet-type bleeding disorder 8

A rare inherited bleeding disorder, also called P2Y12 defect, with easy bruising and bleeding after surgery.

Understanding Platelet-type bleeding disorder 8

Platelet-type bleeding disorder 8, also called P2Y12 defect, is a rare bleeding disorder caused by a problem with a platelet receptor.

The problem is in the platelet P2Y12 receptor, so platelets respond poorly to a signal called adenosine diphosphate. It causes mild to moderate bleeding, easy bruising, bleeding from mucous membranes and heavy bleeding after surgery. It can begin in childhood.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. Its description mentions these:

  • Easy bruising
  • Bleeding from mucous membranes
  • Heavy bleeding after surgery

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 P2RY12 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
Should we have genetic testing for P2RY12, and should siblings be tested?
How should bleeding be managed during surgery or dental work?
Are there medicines I should avoid because of my platelet disorder?

Quick facts

Symptoms usually startChild
InheritanceAutosomal Recessive
GenesP2RY12

Changes in the P2RY12 gene cause this condition. It is autosomal recessive, meaning a child inherits a changed copy of the gene from each parent.

GeneticBlood

Also known as: adp platelet receptor p2y12 defect; bdplt8; bleeding disorder due to adp platelet receptor p2y12 defect; bleeding disorder due to p2rx1 defect, somatic; bleeding disorder due to p2ry12 defect; bleeding disorder due to p2y12 defect

Patient organizations

Source: NIH GARD · Platelet-type bleeding disorder 8GARD ID 12478 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

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