Skip to content
knowrare
HealthSignal
Your condition community

Living with Transient myeloproliferative syndrome

A blood cell overgrowth in newborns with Down syndrome that usually clears up on its own.

Understanding Transient myeloproliferative syndrome

Transient myeloproliferative syndrome is an overgrowth of immature blood cells that occurs in newborns with Down syndrome.

It looks the same as acute myeloid leukemia under the microscope and is linked to GATA1 gene changes. In most babies it clears up on its own (spontaneous remission). It starts during pregnancy or in the newborn period.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet.

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 cancer 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); Cancer specialists (oncologists)
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 Blood Cancer United and other patient organizations
  • 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 will my baby's blood counts be checked over time?
Which specialists, such as a blood specialist, should be on our care team?
What follow-up is needed after it clears?

Quick facts

Symptoms usually startduring Pregnancy and as a Newborn

GARD says it is associated with changes in the GATA1 gene, in newborns with Down syndrome.

Blood

Also known as: leukemia, transient; leukemia, transient, of down syndrome; mst; tam; tmd; transient abnormal myelopoiesis

Patient organizations

Source: NIH GARD · Transient myeloproliferative syndromeGARD ID 12765 · 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 Transient myeloproliferative syndrome.

Explore the Transient myeloproliferative syndrome blog

Explore research for Transient myeloproliferative syndrome

Explore actively recruiting Transient myeloproliferative syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Transient myeloproliferative syndrome 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

Powered by HealthSpark, our AI chat helper

I can help you find recruiting Transient myeloproliferative syndrome studies. Enter a ZIP code, address or city below and I'll look within 50 miles.

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

Get Signals for Transient myeloproliferative syndrome

Stay in the loop with community stories and updates from medical researchers.

HealthStoryfor Transient myeloproliferative syndrome

Create a living journal that talks back

HealthStory evolves private journaling with a living AI journal that talks back and asks thoughtful questions, helping you capture your Transient myeloproliferative syndrome experiences more deeply and prepare for better conversations with your doctors and care team.

Start your journal

Your journal is private. Sharing your story publicly is a separate choice, made with Share your story above.