Aplastic anemia is a condition that occurs when your body stops producing enough new blood cells. The condition leaves you fatigued and more prone to infections and uncontrolled bleeding.

A rare and serious condition, aplastic anemia can develop at any age. It can occur suddenly, or it can come on slowly and worsen over time. It can be mild or severe.

Treatment for aplastic anemia might include medications, blood transfusions or a stem cell transplant, also known as a bone marrow transplant.

Symptoms

Aplastic anemia can have no symptoms. When present, signs and symptoms can include:

• Fatigue
• Shortness of breath
• Rapid or irregular heart rate
• Pale skin
• Frequent or prolonged infections
• Unexplained or easy bruising
• Nosebleeds and bleeding gums
• Prolonged bleeding from cuts
• Skin rash
• Dizziness
• Headache
• Fever

Aplastic anemia can be short-lived, or it can become chronic. It can be severe and even fatal.

Causes

Stem cells in the bone marrow produce blood cells — red cells, white cells and platelets. In aplastic anemia, stem cells are damaged. As a result, the bone marrow is either empty (aplastic) or contains few blood cells (hypoplastic).

The most common cause of aplastic anemia is from your immune system attacking the stem cells in your bone marrow. Other factors that can injure bone marrow and affect blood cell production include:

• Radiation and chemotherapy treatments
• Exposure to toxic chemicals
• Use of certain drugs
• Autoimmune disorders
• A viral infection
• Pregnancy
• Unknown factors

Risk factors

Aplastic anemia is rare. Factors that can increase risk include:

• Treatment with high-dose radiation or chemotherapy for cancer
• Exposure to toxic chemicals
• The use of some prescription drugs — such as chloramphenicol, which is used to treat bacterial infections, and gold compounds used to treat rheumatoid arthritis
• Certain blood diseases, autoimmune disorders and serious infections
• Pregnancy, rarely

Diagnosis

The following tests can help diagnose aplastic anemia:

• Blood tests
• Bone marrow biopsy

Treatment

Treatments for aplastic anemia, which will depend on the severity of your condition and your age, might include observation, blood transfusions, medications, or bone marrow transplantation. Severe aplastic anemia, in which your blood cell counts are extremely low, is life-threatening and requires immediate hospitalization.

• Blood transfusions
• Stem cell transplant
• Immunosuppressants
• Bone marrow stimulants
• Antibiotics, antivirals
• Other treatments

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