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Living with Paris-Trousseau thrombocytopenia

A rare genetic condition with low platelet counts, mild bleeding, and facial differences, noticed in newborns and infants.

Understanding Paris-Trousseau thrombocytopenia

Paris-Trousseau thrombocytopenia is a rare genetic condition with low platelet counts and a mild tendency to bleed.

Platelets are blood cells that help blood clot. In this condition the platelet count varies, and platelets have abnormal large granules. People also have certain facial features. It is called a contiguous gene syndrome because several neighboring genes are involved. Signs are seen in newborns and infants.

Signs & symptoms

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

  • Mild tendency to bleed
  • Low platelet count (thrombocytopenia)
  • Intellectual disability
  • Heart differences

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. Ask which tests can help

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

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 Chromosome Disorder Outreach
  • 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
How should I manage bleeding or bruising?
How often should platelet counts be checked?
Should we check the heart and development?

Quick facts

Symptoms usually startNewborn and as an Infant

Changes in the genes (also called variants) cause this condition. GARD describes it as a contiguous gene syndrome, which means several neighboring genes are affected.

GeneticBlood

Also known as: chromosome 11q23 deletion syndrome; tcpt; thrombocytopenia, paris-trousseau type, isolated cases

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Paris-Trousseau thrombocytopeniaGARD ID 4224 · 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 Paris-Trousseau thrombocytopenia.

Explore the Paris-Trousseau thrombocytopenia blog

Explore research for Paris-Trousseau thrombocytopenia

Explore actively recruiting Paris-Trousseau thrombocytopenia studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Paris-Trousseau thrombocytopenia 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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