Overview
Hereditary thrombocytopenia with early-onset myelofibrosis is a rare inherited blood disorder. It is sometimes called THPO-related thrombocytopenia or early-onset myelofibrosis with thrombocytopenia. In this condition, the body does not make enough platelets — the tiny blood cells that help stop bleeding. At the same time, scar tissue (called fibrosis) builds up inside the bone marrow, which is the spongy tissue inside bones where blood cells are made. When the bone marrow becomes scarred, it cannot produce blood cells properly, which leads to a range of serious problems over time. People with this condition are usually diagnosed in childhood or early adulthood. The low platelet count means that even minor injuries can cause prolonged bleeding or easy bruising. As the bone marrow becomes more scarred, the body may also struggle to make enough red blood cells (causing anemia and fatigue) and white blood cells (raising infection risk). The spleen and liver may enlarge as they try to take over blood cell production. Treatment focuses on managing symptoms and preventing complications. Platelet transfusions may be needed before surgery or during bleeding episodes. In some cases, a bone marrow transplant (stem cell transplant) may be considered, especially if the disease progresses. There is no widely approved cure, and care is managed by a team of blood specialists. Research into targeted therapies is ongoing.
Key symptoms:
Low platelet count (thrombocytopenia)Easy bruisingProlonged or unusual bleeding from cuts or injuriesFatigue and weakness due to anemiaEnlarged spleen (splenomegaly)Enlarged liver (hepatomegaly)Frequent infections due to low white blood cell countsBone pain or discomfortPale skinShortness of breath with activity
Autosomal dominant
Passed on from just one parent; each child has about a 50% chance of inheriting it
Variable
Can begin at different ages, from infancy through adulthood
Treatments
No FDA-approved treatments are currently listed for Hereditary thrombocytopenia with early-onset myelofibrosis.
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Specialists
View all specialists →No specialists are currently listed for Hereditary thrombocytopenia with early-onset myelofibrosis.
Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to Hereditary thrombocytopenia with early-onset myelofibrosis.
Community
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Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
Rare disease caregiving can be isolating. Connect with counseling and peer support.
Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.Which specific gene change has been found in my family, and what does it mean for my prognosis?,How often should I have blood tests and bone marrow biopsies to monitor disease progression?,Am I a candidate for a bone marrow transplant, and when should we consider it?,Are there any clinical trials I should know about for this condition?,What activities or medications should I avoid because of my low platelet count?,Should my family members be tested for this condition?,What signs should prompt me to go to the emergency room immediately?
Common questions about Hereditary thrombocytopenia with early-onset myelofibrosis
What is Hereditary thrombocytopenia with early-onset myelofibrosis?
Hereditary thrombocytopenia with early-onset myelofibrosis is a rare inherited blood disorder. It is sometimes called THPO-related thrombocytopenia or early-onset myelofibrosis with thrombocytopenia. In this condition, the body does not make enough platelets — the tiny blood cells that help stop bleeding. At the same time, scar tissue (called fibrosis) builds up inside the bone marrow, which is the spongy tissue inside bones where blood cells are made. When the bone marrow becomes scarred, it cannot produce blood cells properly, which leads to a range of serious problems over time. People wit
How is Hereditary thrombocytopenia with early-onset myelofibrosis inherited?
Hereditary thrombocytopenia with early-onset myelofibrosis follows a autosomal dominant inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.