Agranulocytosis

Definition

Agranulocytosis is a very low level of white blood cells. These blood cells are part of the immune system. They help fight infections.

Agranulocytosis may be:

• Acquired—develops after medical treatment or specific drugs. May appear suddenly or develop over time.
• Congenital—present at birth
  • Cyclic neutropenia—cyles up and down over 21 day period
  • Severe congenital neutropenia

White Blood Cells

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Causes

Agranulocytosis is caused by destruction of white blood cells or by the failure of bone marrow to make enough white blood cells.

With congenital agranulocytosis, these problems are caused by a genetic defect.

With acquired agranulocytosis, these problems may be caused by:

• Infections—caused by virus, bacteria or parasite
• Underlying inflammatory condition
• Chemotherapy
• Drugs—used in medical treatment or recreational use
• Autoimmune disease—your immune systems attacks your own tissue such as white blood cells
• Illnesses or damage to bone marrow
• Certain toxins
• Poor nutrition—particularly low protein intake

Risk Factors

Factors that increase your chance of developing agranulocytosis include:

• Undergoing chemotherapy treatment for cancer
• Taking certain medications—including some antithyroid medication, antidepressants, antihistamines, anticonvulsants
• Infection
• Exposure to certain chemical toxins or radiation
• Autoimmune diseases
• Enlargement of the spleen
• Vitamin B-12 or folate deficiency
• Leukemia or myelodysplastic syndromes
• Aplastic anemia or other diseases of the bone marrow
• Family history of certain genetic diseases

Symptoms

If you have any of these symptoms do not assume it is due to agranulocytosis. These symptoms may be caused by other, less serious health conditions.

There are often no symptoms until you have an infection. Symptoms of agranulocytosis may include:

• Rapid onset of fever, chills, jaundice, weakness, or sore throat
• Ulcers in the mouth
• Bleeding gums
• Infections, including certain fungal infection (these types of infections are often only present in people with compromised immune systems)

Symptoms of congenital agranulocytosis may include:

• Severe recurrent bacterial infections
• Mild infections of skin, mouth, and nose
• Failure to thrive—with persitent agranulocytosis

Diagnosis

Your doctor will ask about your symptoms and medical history. You will be asked about recent infections, medical treatments, and medications. A physical exam will be done.

Blood tests may be done to diagnose agranulocytosis. The tests will include:

• White blood cell count
• Antineutrophil antibodies—for people with autoimmune disease
• Genetic tests may be needed in some people

To help determine a cause your doctor may also order:

• Bone marrow test
• Urine or other fluid tests—to look for infectious agents

Treatment

Treatment will be based on the type and cause of agranulocytosis that you have. Options include the following:

Prevention

Your doctor will monitor you if you are taking medication or having medical treatment that could lead to agranulocytosis. You may be given a white blood cell stimulating medications before having these other treatments. This may prevent agranulocytosis for some.