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Living with Thrombocytopenia 2

An inherited condition with a low platelet count that can cause mild bleeding and easy bruising.

Understanding Thrombocytopenia 2

Thrombocytopenia 2 (THC2) is an inherited condition that lowers the number of platelets, the blood cells that help blood clot.

The platelets that are present look and work as they should, and so does the bone marrow where they are made. The low count may be because the body makes too few platelets or does not release them properly. This can cause mild bleeding.

Signs & symptoms

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

  • Low platelet count (thrombocytopenia)
  • Easy bruising
  • Mild bleeding
  • Higher white blood cell 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

    Your doctor may refer you to a specialist who knows rare conditions.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
A doctor familiar with rare conditions, plus specialists as needed
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 genetic testing of the ANKRD26 gene confirm this diagnosis?
How often should my platelet counts be checked?
Which specialists, such as a hematologist, should be on my care team?

Quick facts

InheritanceAutosomal Dominant

THC2 is caused by changes in the ANKRD26 gene. It is autosomal dominant, which means one changed copy of the gene can be enough to cause it.

Also known as: thc2; thrombocytopenia type 2

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Thrombocytopenia 2GARD ID 5191 · 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 Thrombocytopenia 2.

Explore the Thrombocytopenia 2 blog

Explore research for Thrombocytopenia 2

Explore actively recruiting Thrombocytopenia 2 studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Thrombocytopenia 2 with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • 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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