Medically Reviewed By William C. Lloyd III, MD, FACS

What is pancytopenia?

Pancytopenia is a deficiency of all types of blood cells, including white blood cells, red blood cells, and platelets. It occurs when your body cannot produce enough blood cells because the bone marrow stem cells that form blood cells do not function normally. Pancytopenia has widespread effects on the entire body by leading to oxygen shortage as well as problems with immune function. Aplastic anemia is a medical term that refers to a decrease in production of all types of blood cells.

Pancytopenia occurs in two forms: idiopathic, in which the cause is not known, but is often autoimmune, meaning that the body attacks its own tissues as foreign substances; and secondary, often caused by environmental factors. Approximately half of all pancytopenia cases are idiopathic. In other cases, viral infections, radiation or chemotherapy treatments, drug reactions, and exposure to toxins may precipitate the development of pancytopenia.

Pancytopenia may develop slowly over time or suddenly, and it can progress in a variety of ways. Symptoms of pancytopenia can include bleeding, easy bruising, fatigue, shortness of breath, and weakness. The decrease in white blood cells, which are involved in the body’s defense, or immune, system, also leads to an increased risk of infection. Treatments for pancytopenia include drugs that suppress the immune system (immunosuppressant drugs) and bone marrow stimulant drugs, blood transfusion, bone marrow transplant, and stem cell replacement therapy.

In some cases, symptoms of pancytopenia can be severe or life-threatening. Seek immediate medical care (call 911) if you experience high fever, seizures or convulsions, difficulty breathing, heavy bleeding, or confusion or loss of consciousness for even a brief moment


What are the symptoms of pancytopenia?

Symptoms of pancytopenia include generalized symptoms such as fatigue and weakness, as well as skin symptoms, such as easy bruising or rash. Bleeding, including nosebleeds, bleeding of the gums, unexplained bleeding, or bleeding of the internal organs, is common in pancytopenia.

Generalized symptoms of pancytopenia

You may experience pancytopenia symptoms daily or just once in a while. At times, any of these symptoms can be severe:

  • Bleeding gums
  • Fatigue
  • Frequent infections
  • Nosebleeds
  • Pale skin or pallor
  • Rapid heart rate (tachycardia)
  • Rash
  • Shortness of breath
  • Skin discoloration such as bruising
  • Weakness (loss of strength)

Serious symptoms that might indicate a life-threatening condition

In some cases, pancytopenia can be life threatening. Seek immediate medical care (call 911) if you, or someone you are with, have any of these life-threatening symptoms including:

  • Confusion or loss of consciousness for even a brief moment
  • Excessive bleeding without apparent cause
  • Extreme fatigue, weakness, or shortness of breath
  • High fever (higher than 101 degrees Fahrenheit)

What causes pancytopenia?

Pancytopenia can be caused by heredity, medications, or exposure to environmental contaminants such as radiation or arsenic. In approximately half of cases, called idiopathic cases, the exact cause of the pancytopenia is not known. It may be linked to an autoimmune disorder, in which the body’s immune system attacks its own tissues as foreign substances, or an environmental contaminant. In rare cases, pregnancy can lead to autoimmune processes that may trigger pancytopenia.

It is important for your health care professional to determine the cause of pancytopenia in order to recommend the appropriate treatment. For example, pancytopenia caused by an environmental contaminant may spontaneously resolve when the contaminant is removed.

Environmental causes of pancytopenia

Environmental factors, such as medications, toxins or infections, have been identified as causes of pancytopenia in some cases. Examples include:

  • Certain medications, including some antibiotics and immunosuppressant drugs

  • Chemical toxins such as benzene

  • Chemotherapy

  • Radiation exposure

  • Viral infections

What are the risk factors for pancytopenia?

A number of factors increase your risk of developing pancytopenia. Not all people with risk factors will get pancytopenia. Risk factors for pancytopenia include:

  • Chemotherapy

  • Exposure to environmental toxins such as benzene or arsenic

  • Family history of blood disorders

  • Lupus or certain other autoimmune disorders

  • Pregnancy

  • Radiation exposure

  • Specific types of drugs, especially those that suppress the immune system (immunosuppressant drugs)

Reducing your risk of pancytopenia

Although pancytopenia is unavoidable in many cases, you may be able to lower your risk of pancytopenia by:

  • Avoiding environmental contaminants (for example, benzene or arsenic)

  • Avoiding radiation exposure

How is pancytopenia treated?

In very mild cases of pancytopenia, treatment may not be necessary. In moderate cases, blood transfusions may help restore blood cell counts; however, transfusions may become less effective over time. In severe cases, treatments such as bone marrow transplant and stem cell therapy may be required to restore the ability of bone marrow to produce blood cells. Such treatments are generally effective in younger patients, but older patients may also require the use of immunosuppressant drugs or drugs that stimulate the bone marrow.

In cases related to environmental factors, pancytopenia may resolve on its own when the precipitating factor is removed or the underlying condition is treated.

Immunosuppressant medications used to treat pancytopenia

If the immune system is suspected of attacking bone marrow, immunosuppressant drugs may be administered. Examples include:

  • Antithymocyte antibodies (Thymoglobulin), which suppress the body’s natural immune response

  • Corticosteroids, such as methylprednisolone (Medrol, Solu-Medrol)

  • Cyclophosphamide (Cytoxan)

  • Cyclosporine (Sandimmune, Neoral)

Bone marrow–stimulating drugs used to treat pancytopenia

Sometimes, drugs that stimulate bone marrow function are prescribed. Examples include:

  • Epoetin alfa (Epogen, Procrit)

  • Filgrastim (Neupogen)

  • Pegfilgrastim (Neulasta)

  • Sargramostim (Leukine, Prokine)

What are the potential complications of pancytopenia?

Left untreated, pancytopenia is extremely serious and can lead to life-threatening bleeding and infections. In younger patients, treatments such as bone marrow transplant and blood transfusion are generally successful at treating pancytopenia, but complications tend to be more severe in the elderly. You can help minimize your risk of serious complications by following the treatment plan you and your health care professional design specifically for you.

Complications of pancytopenia or its treatment include:

  • Bleeding in the brain

  • Complications from blood transfusions

  • Complications from medications used to treat the condition

  • Poor reaction to bone marrow transplant (graft rejection)

  • Sepsis (life-threatening bacterial blood infection)

  • Severe bleeding

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  1. Aplastic anemia. Medline Plus, a service of the National Library of Medicine National Institutes of Health.
  2. Explore aplastic anemia. National Heart, Lung and Blood Institute. Meta Data 
  3. 1 Minute Read: Pancytopenia Differential Diagnosis. Isabel healthcare.
Medical Reviewer: William C. Lloyd III, MD, FACS
Last Review Date: 2021 Jan 16
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