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Living with Multiple paragangliomas associated with polycythemia

A rare hormone-related condition with extra red blood cells starting early, followed later by several tumors called paragangliomas.

Understanding Multiple paragangliomas associated with polycythemia

Multiple paragangliomas associated with polycythemia is a rare hormone-related condition with too many red blood cells and several tumors.

This condition starts in childhood with polycythemia, which means a high number of red blood cells. Later, people develop several paragangliomas (tumors of nerve-related tissue). Features include high blood pressure, headaches, tiredness, nausea, and anxiety. The extra red blood cells raise the risk of stroke and blood clots in the lungs.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet, but the summary describes these features:

  • High blood pressure
  • Headaches
  • Tiredness (fatigue)
  • Nausea
  • Anxiety
  • High number of red blood cells (polycythemia)

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, cancer specialists, genetic specialists and hormone specialists.

  3. Consider genetic testing

    Changes in EPAS1 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    Pheo Para Alliance may keep lists of experts for this condition.

Care & treatment

Care team
Blood and bone marrow specialists (hematologists); Cancer specialists (oncologists); Genetic specialists (geneticists); Hormone specialists (endocrinologists)
Expert care
Expert lists: Pheo Para Alliance
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 Pheo Para Alliance
  • 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
Should we have genetic testing for the EPAS1 gene?
How can we manage blood pressure and red blood cell levels?
Which specialists should be on my care team?

Quick facts

Symptoms usually startChild
GenesEPAS1

GARD lists changes in the EPAS1 gene as linked to this condition.

GeneticEndocrineBlood

Also known as: multiple paraganglioma associated with erythrocytosis; multiple paraganglioma associated with polycythemia; multiple paragangliomas associated with erythrocytosis; paraganglioma-somatostatinoma-polycythemia syndrome; paraganglioma, somatostatinoma, polycythemia syndrome

Patient organizations

Source: NIH GARD · Multiple paragangliomas associated with polycythemiaGARD ID 21435 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

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