Blood Disorders: Polycythemia Vera
Polycythemia Vera (PV) is a disorder that stimulates an overproduction of red blood cells, white blood cells, and platelets. Some patients with PV will not demonstrate any symptoms at all, but many will experience easy bruising or bleeding with little or no injury. Also, the blood may be thick and gummy, causing it to clot in tiny blood vessels. If clotting occurs in the tiny blood vessels of the fingers and toes, a patient may experience numbness or burning. If it occurs in the brain, it may lead to mental confusion or, in more serious cases, a stroke.
Occasionally, the increased blood volume also causes congestion and enlargement of the spleen or liver. These organs may become enlarged because they are trying to produce extra blood cells, a process called extramedullary hematopoiesis. If the spleen becomes too enlarged, it can cause discomfort after eating, difficulty breathing, and chest pain.
Every year, there are five new cases of PV per 1,000,000 people. The average age of a person diagnosed with PV is 60 years old, although it can affect both young and older people, and it occurs more often in males than females. There is no known cure.
To diagnose PV, your doctor will order a blood test to count the number of cells in your blood. He or she may also perform a blood smear to determine if the cells appear normal. If these tests are abnormal, you may be referred to a hematologist, a doctor who specializes in diagnosing and treating bone marrow and blood disorders. Further special testing will likely be recommended.
The primary goal of treatment is to lower the number of cells in your blood. The treatment you receive will depend on your age, health, if you are having any symptoms, and the results of your blood test. It may include:
Phlebotomy is the process of removing blood from the body to reduce cell levels. It can be repeated when necessary.
Chemotherapy uses medication to slow the production of blood cells in the body. One type of chemotherapy often used to treat PV is hydroxyurea.
Biological Therapy, or immunotherapy, uses substances made naturally in the body to stimulate or bolster your own immune response to the disorder. One type of natural substance used to treat PV is alpha interferon.
A Radioactive drug called P32, or radioactive phosphorous, is sometimes given to patients with PV. Once injected, the medication travels to the bone marrow and destroys the overactive marrow cells. This treatment affects the white blood cells and platelets quickly, but may take about three months before affecting red blood cells. Because of this, your doctor may order phlebotomy treatments for several weeks after you receive P32.
Your doctor might prescribe additional medication to combat the symptoms of PV. To control itching, you may be given cholestyramine, cyproheptadine, cimetidine, or psoralen plus ultraviolet light treatment. You might also be given medication to counter the symptoms of high uric acid levels in the blood or swelling in the toes. Your doctor is the best person to tell you which treatment is best for you.
Managing Polycythemia Vera
In addition to the treatment recommended by your doctor, there are steps you can take to help reduce or prevent the symptoms of PV:
- Stop chewing or smoking tobacco. Your doctor or nurse can recommend programs in your community to help you do this.
- Balance activities with regular rest periods. This ensures that your body conserves energy.
- Avoid sodium or salt rich foods. These foods may cause fluid retention and make some symptoms worse.
- Engage in light exercise, such as walking. This can be helpful in promoting circulation and the function of your heart.
- Breathe deeply and cough periodically. Deep breaths and coughing can help keep your airways open and prevent infection.
- Bathe or shower in cool water if warm baths cause itching.
- Dry your skin gently after bathing.
- Avoid scratching the skin.
- Use lotion to maintain skin moisture.
- Protect your hands and feet from injury, heat, cold and pressure.
- Avoid straining when having bowel movements.
- Eat a well balanced diet to maintain proper weight.
- Perform leg and ankle exercises to prevent clots from forming in the deep veins of the legs. Your doctor or nurse will show you these exercises.
- Inspect your feet regularly and report any sores to your doctor.
It is important that you be alert for any change or increase in symptoms. If this occurs, it may mean that you need additional or different treatments, and you should contact your doctor right away. The following symptoms require prompt attention:
Enlargement of the Spleen Symptoms
- discomfort or bloating in the abdomen
- enlargement of the abdomen
- weight loss
- stomach pain
- blood in your stools or rectal bleeding
- redness or burning sensation in the fingers, hands, and feet
- visual changes
- confusion in speech
- numbness, tingling, or weakness in arms or legs
- pain or swelling in arms or legs
- shortness of breath
- ruddy color in the face, hands, and feet
- chest pain
- increased cough
- coughing up blood
Cardiopulmonary Problem Symptoms
- pressure in the head
- shortness of breath
- weakness and fatigue
- pain in hands or feet
- visual disturbances
Irritated Skin Symptoms
- itching, especially after bathing in hot water or sleeping in bed
Follow-Up Care and Prognosis
PV requires regular appointments with your doctor. He or she will want to discuss your symptoms and do periodic blood counts to evaluate your response to treatment.
Polycythemia Vera is a disorder that cannot be cured, but it can be controlled with treatment. Some patients may only need minimal care and observation, while others may require more intensive treatment. In a small number of patients, PV may transform into another type of disorder, especially myelofibrosis or acute leukemia.
If you have questions or concerns about your treatment and prognosis, do not hesitate to discuss these with your doctor. It may be helpful to write your questions out before your visit.
Cancer Center Staff