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Polycythemia in Children

  • Polycythemia is a rare blood disorder that occurs when there are too many red blood cells circulating in the bloodstream. Red blood cells carry oxygen from the lungs to all parts of the body. Polycythemia causes the blood to thicken, making it more difficult for the blood to flow through the body to the organs.

    Polycythemia can be divided into two overarching categories:
    • Primary polycythemia, caused by overproduction of red blood cells by the bone marrow due to mutation or biological factor in the body.
    • Secondary polycythemia, which is caused by factors that reduce the amount of oxygen reaching the body's tissues, such as smoking, high altitude or congenital heart disease. The red blood cells in some patients with secondary polycythemia may carry an abnormal form of hemoglobin that does not release oxygen readily (high-affinity hemoglobin).

    Polycythemia Treatment at Dana-Farber/Boston Children's

    Children with polycythemia are treated at the Blood Disorders Center at Dana-Farber/Boston Children's, where children and young adults receive care from some of the world’s most experienced hematologists with deep experience in the conditions they treat.

    Learn more
    Find more in-depth information on polycythemia on the Dana-Farber/Boston Children's website, including answers to:
    • What is polycythemia?
    • What are the symptoms of polycythemia?
    • How is polycythemia in children diagnosed?
    • How is polycythemia in children treated?
    • What is the latest research on polycythemia?
    • What is the long-term outlook for children with polycythemia?
The future of pediatrics will be forged by thinking differently, breaking paradigms and joining together in a shared vision of tackling the toughest challenges before us.”
- Sandra L. Fenwick, President and CEO
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