People with neutropenia have an unusually low number of cells called neutrophils. Neutrophils are cells in your immune system that attack bacteria and other organisms when they invade your body.
Neutrophils are a type of white blood cell. Your bone marrow creates these cells. They then travel in your bloodstream and move to areas of infection. They release chemicals to kill invading microorganisms.
Symptoms of Neutropenia
Neutropenia itself often doesn't cause symptoms. In some cases, people only learn they have neutropenia when they have a blood test for an unrelated reason. But people may have other symptoms from infection or the underlying problem causing the neutropenia.
Infections can occur as a complication of neutropenia. They occur most often in the mucous membranes, such as the inside of the mouth and the skin.
These infections can appear as:
- Abscesses (collections of pus)
- Wounds that take a long time to heal
Fever is also a common symptom of infection.
The risk for serious infection generally increases as:
- Neutrophil count goes down
- Duration of severe neutropenia gets longer
The causes of neutropenia include:
- Problem in the production of neutrophils in the bone marrow
- Destruction of neutrophils outside the bone marrow
- Nutritional deficiency
Causes of decreased production of neutrophils include:
- Being born with a problem with bone marrow production (congenital)
Leukemia and other conditions that affect the bone marrow or lead to bone marrow failure
Infections that can cause neutropenia include:
- Dengue fever
- Viral infections such as Epstein-Barr virus, cytomegalovirus, HIV, viral hepatitis
Increased destruction of neutrophils can be due to the body's immune system targeting neutrophils for destruction. This may be related to having an autoimmune condition, such as:
- Rheumatoid arthritis
In some people, neutropenia can be caused by certain medications, such as:
- Blood pressure drugs
- Psychiatric drugs
- Epilepsy drugs
When deciding on treatment, health care providers consider the cause and severity of the neutropenia. Mild cases may not need any treatment.
Approaches for treating neutropenia include:
- Antibiotics for bacterial infections, if the underlying cause is an infection
- A treatment called granulocyte colony-stimulating factor (G-CSF). This stimulates the bone marrow to produce more white blood cells. It is used for several types of neutropenia, including congenital types. This treatment can be lifesaving in these cases.
- Changing medications, if possible, in cases of drug-induced neutropenia
- Granulocyte (white blood cell) transfusion
- Stem cell transplants may be useful in treating some types of severe neutropenia, including those caused by bone marrow problems.