Erythropoietin (EPO) is a hormone created by the kidney. EPO promotes red blood cell formation via the bone marrow. Low levels of EPO may indicate anemia. Elevated EPO levels may indicate polycythemia rubra vera or hormone misuse by some athletes whose performance benefit from higher red blood cell counts. Such athletes include:
- long-distance runners,
- speed skaters,
- and Nordic (cross-country) skiers.
Picture of Kidneys
The kidneys are a pair of organs located in the back of the abdomen. See a picture of the Kidneys and learn more about the health...learn more »
Kidney failure can occur from an acute event or a chronic condition or disease. Prerenal kidney failure is caused by blood loss,...learn more »
Kidney stones are solid masses of crystalline material that form in the kidneys. Symptoms of kidney stones can include pain,...learn more »
Anemia is the condition of having less than the normal number of red blood cells or less than the normal quantity of hemoglobin...learn more »
Leukemia is a type of cancer of the blood cells in which the growth and development of the blood cells are abnormal. Strictly...learn more »
In This Article
- Leukemia facts
- What is leukemia? What are the different types of leukemia?
- What causes leukemia? Is leukemia hereditary?
- What are leukemia risk factors?
- What are leukemia symptoms and signs?
- How do physicians diagnose leukemia?
- What is the treatment for leukemia?
- What are complications of leukemia?
- What is the prognosis of leukemia?
- Is it possible to prevent leukemia?
- What support groups are available for people with leukemia?
- What research is being done on leukemia?
In This Article
Polycythemia (High Red Blood Cell Count) Article
- Polycythemia facts
- What is polycythemia?
- What are normal ranges of hematocrit, red cell counts, and hemoglobin?
- What causes polycythemia?
- What are the causes of primary polycythemia?
- What are the common causes of secondary polycythemia?
- Can other sources of erythropoietin (EPO) cause polycythemia?
- What is relative polycythemia?
- What are the risk factors for polycythemia?
- What is stress polycythemia?
- What are the symptoms of polycythemia?
- When should I see a doctor about polycythemia?
- How is polycythemia diagnosed?
- What is the treatment for polycythemia?
- What are the complications of polycythemia?
- Can polycythemia be prevented?
- What is the outlook (prognosis) for polycythemia?
A stroke is an interruption of the blood supply to part of the brain caused by either a blood clot (ischemic) or bleeding...learn more »
In This Article
- Stroke definition and facts
- What is a stroke?
- What is the NIH Stroke Scale?
- What are the risk factors for stroke?
- What are the warning signs and symptoms of a stroke?
- What are the signs and symptoms of a stroke?
- What is a transient ischemic attack (TIA)?
- What are the types of stroke?
- What causes a stroke?
- What tests diagnose stroke?
- What is the treatment for stroke?
- Is recovery after a stroke possible?
- What is stroke rehabilitation?
- What is the prognosis for a person that suffers a stroke?
- Which specialties of doctors treat stroke?
- Can strokes be prevented?