Myeloproliferative Disorders (Polycythemia Vera, Essential Thrombocythemia)

What is Myeloproliferative Disorders (Polycythemia Vera, Essential Thrombocythemia)?

Myeloprolifeferative disorders are a group of rare blood cancers where your bone marrow makes too many blood cells. The bone marrow is the spongy tissue inside your bones that produces red blood cells, white blood cells, and platelets. In these conditions, the marrow goes into overdrive and creates an excess of one or more blood cell types.

Polycythemia vera happens when your body makes too many red blood cells. This thickens your blood and slows its flow through your veins and arteries. Essential thrombocythemia occurs when your bone marrow produces too many platelets, the cells that help your blood clot. Both conditions are chronic, meaning they last for years or a lifetime.

These disorders develop slowly and many people live with them for decades with proper monitoring and treatment. While they are serious conditions, modern medicine offers many ways to manage symptoms and reduce complications. Early detection through blood testing helps doctors create a treatment plan before serious problems develop.

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Symptoms

Headaches that feel dull or throbbing
Dizziness or lightheadedness, especially when standing
Blurred vision or seeing spots
Itching all over your body, especially after a warm bath or shower
Reddish or purplish skin color, particularly on your face, hands, or feet
Fatigue that does not improve with rest
Easy bruising or unusual bleeding
Enlarged spleen that causes fullness or discomfort in the upper left belly
Numbness, tingling, or burning feelings in your hands or feet
Chest pain or shortness of breath during physical activity

Many people have no symptoms in the early stages of these disorders. Blood cell abnormalities are often discovered during routine blood work done for another reason. This makes regular blood testing important for catching these conditions before they cause problems.

Causes and risk factors

Myeloproliferative disorders happen because of changes in your genes, called mutations. The most common mutation is in a gene called JAK2, which controls blood cell production. About 95 out of 100 people with polycythemia vera have this mutation. Around 50 to 60 out of 100 people with essential thrombocythemia have it too. These gene changes are acquired during your lifetime, not inherited from your parents. Scientists do not know exactly what triggers these mutations to occur.

Risk factors include being over age 60, though these conditions can happen at any age. Men are slightly more likely to develop polycythemia vera, while women are slightly more likely to get essential thrombocythemia. Exposure to high levels of radiation or certain chemicals may increase risk, but most people with these disorders have no known environmental exposures. Having a family member with a myeloproliferative disorder slightly raises your risk, but these conditions are not usually passed down through families.

How it's diagnosed

Doctors diagnose myeloproliferative disorders through blood tests that count your red blood cells, white blood cells, and platelets. A complete blood count shows whether you have too many of any blood cell type. White blood cell count monitoring helps track disease activity and response to treatment. Additional testing includes checking your hematocrit, which measures the percentage of blood made up of red blood cells. Genetic testing looks for mutations in the JAK2 gene and other related genes.

Rite Aid offers blood testing that includes white blood cell count as part of our flagship panel. This helps identify abnormal blood cell levels that may indicate a myeloproliferative disorder. If results show concerning patterns, your doctor may order specialized tests like bone marrow biopsy or specific genetic testing to confirm the diagnosis. Early detection through regular blood work allows for faster treatment and better outcomes.

Treatment options

Phlebotomy for polycythemia vera, where doctors remove blood regularly to reduce red blood cell levels
Low-dose aspirin to reduce blood clot risk and ease symptoms
Hydroxyurea medication to slow down blood cell production in the bone marrow
Interferon alfa injections to control blood cell counts, especially in younger patients
Ruxolitinib medication for people who do not respond well to other treatments
Drinking plenty of water to keep blood flowing smoothly
Avoiding tobacco, which increases clot risk
Managing other health conditions like high blood pressure and diabetes
Regular blood monitoring to track cell counts and adjust treatment
Treating itching with antihistamines or other medications if needed

Frequently asked questions

Polycythemia vera causes your body to make too many red blood cells, which thickens your blood. Essential thrombocythemia makes your body produce too many platelets, the cells that form blood clots. Both are types of myeloproliferative disorders where bone marrow creates excess blood cells. They can have similar symptoms but require different monitoring approaches.

These disorders cannot be cured, but they can be managed effectively for many years or decades. Treatment focuses on controlling blood cell counts and preventing complications like blood clots. Most people with these conditions live long lives with proper medical care. Regular blood testing and medication help keep the disorder under control.

Most people need blood testing every 3 to 6 months once their condition is stable. During initial diagnosis or treatment changes, you may need testing more often, such as monthly. Your doctor will create a testing schedule based on your cell counts and how well treatment is working. Regular monitoring helps prevent complications and adjust medications as needed.

Many people with myeloproliferative disorders take medication long term to control blood cell production. Some people with polycythemia vera manage well with just phlebotomy and low-dose aspirin. Your treatment plan depends on your cell counts, symptoms, age, and clot risk. Your doctor adjusts medications based on how your body responds over time.

Untreated myeloproliferative disorders increase risk of blood clots, which can cause stroke, heart attack, or clots in leg veins. The spleen may enlarge and cause discomfort or other problems. Some people develop acute leukemia, though this is uncommon. Regular monitoring and treatment reduce these risks significantly.

Yes, lifestyle choices support medical treatment and improve outcomes. Staying well hydrated keeps blood flowing smoothly. Avoiding tobacco is critical because it increases clot risk. Maintaining a healthy weight and managing blood pressure help protect your heart and blood vessels. Regular gentle exercise improves circulation when your doctor says it is safe.

About 40 out of 100 people with polycythemia vera experience itching, especially after warm baths or showers. Excess blood cells release chemicals called histamines that irritate nerve endings in your skin. The itching can be intense and affect quality of life. Antihistamines, controlling cell counts, and using lukewarm water for bathing often help reduce this symptom.

These disorders are not usually passed from parents to children. The gene mutations that cause them happen during your lifetime rather than being inherited. Having a family member with a myeloproliferative disorder slightly increases your risk, but most people with these conditions have no family history. Genetic counseling can help if you have concerns about family risk.

Most people with these disorders continue working and maintaining their regular activities. Fatigue may require some adjustments like taking breaks or reducing hours temporarily. Regular medical appointments and blood tests become part of your routine. With proper treatment, many people have few symptoms and good quality of life for years.

Seek emergency care immediately if you experience chest pain, trouble breathing, sudden severe headache, weakness on one side of your body, or leg pain with swelling. These symptoms may indicate a blood clot requiring urgent treatment. Blood clots are a serious complication of myeloproliferative disorders. Quick medical attention can prevent permanent damage or save your life.