Overview
Chuvash erythrocytosis (also called Chuvash polycythemia) is a rare inherited blood disorder in which the body makes too many red blood cells. Unlike some other forms of polycythemia, this condition is not caused by a bone marrow cancer. Instead, it results from a genetic change that tricks the body into acting as though oxygen levels are low, even when they are normal. This causes the kidneys and other tissues to produce excess erythropoietin (EPO), a hormone that stimulates red blood cell production. The extra red blood cells make the blood thicker than normal, which can lead to headaches, dizziness, fatigue, and a reddish or ruddy complexion. More seriously, the thickened blood raises the risk of blood clots, which can cause strokes, deep vein thrombosis, or pulmonary embolism. Some patients also experience low blood pressure and may develop varicose veins or bleeding complications. Chuvash erythrocytosis was first identified in the Chuvash population of Russia but has since been found in other ethnic groups worldwide. Treatment focuses on reducing the number of red blood cells, usually through regular phlebotomy (blood removal), and managing the risk of blood clots. There is currently no cure, but with careful monitoring and treatment, many patients can lead relatively normal lives. Early diagnosis is important to prevent potentially life-threatening clotting events.
Key symptoms:
Too many red blood cells (high hemoglobin and hematocrit)HeadachesDizziness or lightheadednessFatigue and low energyReddish or ruddy skin color, especially on the faceBlood clots in veins (deep vein thrombosis)Blood clots in the lungs (pulmonary embolism)StrokeLow blood pressureVaricose veinsBleeding episodes (nosebleeds or gum bleeding)Shortness of breathTingling or numbness in hands and feetElevated erythropoietin (EPO) levels in the blood
Autosomal recessive
Passed on when both parents carry the same gene change; often skips generations
Variable
Can begin at different ages, from infancy through adulthood
Treatments
No FDA-approved treatments are currently listed for Chuvash erythrocytosis.
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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 Chuvash erythrocytosis.
Community
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Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
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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.What is my target hematocrit level, and how often will I need phlebotomy?,Should I take low-dose aspirin or any blood-thinning medication?,Are there specific activities or situations I should avoid to reduce my clotting risk?,How will you monitor me for complications like blood clots or stroke?,Should my family members be tested for the VHL mutation?,Are there any clinical trials or new treatments being studied for Chuvash erythrocytosis?,What should I do if I experience sudden symptoms like chest pain, leg swelling, or severe headache?
Common questions about Chuvash erythrocytosis
What is Chuvash erythrocytosis?
Chuvash erythrocytosis (also called Chuvash polycythemia) is a rare inherited blood disorder in which the body makes too many red blood cells. Unlike some other forms of polycythemia, this condition is not caused by a bone marrow cancer. Instead, it results from a genetic change that tricks the body into acting as though oxygen levels are low, even when they are normal. This causes the kidneys and other tissues to produce excess erythropoietin (EPO), a hormone that stimulates red blood cell production. The extra red blood cells make the blood thicker than normal, which can lead to headaches,
How is Chuvash erythrocytosis inherited?
Chuvash erythrocytosis follows a autosomal recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
Which specialists treat Chuvash erythrocytosis?
2 specialists and care centers treating Chuvash erythrocytosis are listed on UniteRare, sourced from ClinicalTrials.gov principal investigators, published research, and the NPPES NPI registry.