Your blood is made up of different types of blood cells, including white blood cells (WBCs), which are also known as leukocytes. Show
WBCs are an important part of your immune system. They help your body fight off diseases and infections. If you have too few WBCs, you have a condition known as leukopenia. In this article, we take a closer look at leukopenia, including types, symptoms, causes, and treatment. WBC counts are typically reported as part of a blood test called a complete blood count or CBC. The results can be reported as cells per microliter (μL) of blood or as cells per cubic millimeter (mm3) of blood. The table below shows the typical ranges of WBCs, according to the Leukemia and Lymphoma Society. Generally speaking, when WBC numbers fall below these reference ranges, you have leukopenia. Your doctor will order additional tests to determine what’s leading to your low WBC levels. It’s important to point out that the exact reference ranges that are used can vary based off the laboratory performing the test. Because of this, always refer to the reference ranges that are listed on the report of your test results. There are several different types of leukopenia, depending on which type of WBC is low in your blood. The types of WBCs include:
Each WBC type has a different function in protecting your body from infections or harmful substances. If your blood is low in neutrophils, you have a type of leukopenia known as neutropenia. Neutrophils are the WBCs that protect you from many types of infections, particularly those involving fungi or bacteria. Neutrophils make up 55 to 70 percent of your total WBC count. Because of this, leukopenia is often caused by a decrease in neutrophils. In fact, some people use the terms “leukopenia” and “neutropenia” interchangeably. Another common type of leukopenia is lymphocytopenia, which is when you have too few lymphocytes. Lymphocytes are the WBCs that protect you from a variety of infections and also from cancerous cells. Many diseases and conditions can cause leukopenia, such as: Blood cell or bone marrow conditionsWBCs originate from the stem cells in the bone marrow. Because of this, conditions affecting blood cells or the bone marrow can lead to leukopenia. Some examples of such conditions include:
Your spleen is also important in the production of WBCs. Splenomegaly, or an enlarged spleen, can also lead to leukopenia. Treatments for cancerCancer treatments are aimed at targeting and eliminating rapidly dividing cancer cells within your body. However, because blood cells also grow rapidly, some cancer treatments can destroy these cells as well. The cancer treatments that may lead to leukopenia include:
Congenital disordersCongenital disorders are present at birth. The ones that can lead to leukopenia include conditions that affect how bone marrow works to make blood cells, such as:
Infectious diseasesSeveral infectious diseases that can cause leukopenia include:
Other acute viral infections, such as the flu, or any very severe infection can also lead to leukopenia. Autoimmune disordersSome autoimmune disorders can kill WBCs or bone marrow stem cells, which make blood cells, and can lead to leukopenia. Examples of autoimmune disorders that may cause leukopenia are:
MalnutritionLeukopenia can be caused by vitamin or mineral deficiencies, such as deficiencies in:
MedicationsCertain medications can also cause leukopenia as a side effect. Some examples are:
SarcoidosisSarcoidosis is a systemic illness caused by an exaggerated immune response. It’s characterized by the formation of granulomas, or small areas of inflammation, in multiple systems in your body. When these granulomas form in your bone marrow, leukopenia can result. Anyone who has a condition that can cause leukopenia is at risk. Leukopenia usually doesn’t lead to noticeable symptoms. Your doctor will monitor your WBC counts carefully if you have any of the conditions that can lead to leukopenia. This means undergoing frequent blood tests. Because leukopenia involves low levels of infection-fighting immune cells, it can cause some potentially serious complications if left untreated. Some of the complications of leukopenia include:
In order to diagnose leukopenia, your doctor will first do a physical exam and get your medical history. They’ll ask you about:
A complete blood count (CBC) is one of the first tests that’s used to help diagnose leukopenia. This test will inform your doctor about the levels of WBCs, red blood cells, and platelets in your blood. A CBC can show that your overall levels of WBCs are low. However, your doctor will probably want more details. They’ll likely order a CBC with a differential. A differential breaks down the levels of different types of WBCs, which can help to determine the specific type of WBC that’s low. Once your WBC count is deemed low, your doctor will order other tests to help determine the cause of your condition. Some examples include:
Treatment for leukopenia depends on which type of WBC is low and what’s causing it to be so. You may also need other treatments to take care of any infections that develop from not having enough WBCs. Common treatments include: Stopping treatments or medications that cause leukopeniaSometimes you may need to stop a treatment to give your body time to make more WBCs. Your blood cell counts may naturally rise when treatment like radiation is over or between chemotherapy sessions. The amount of time it takes for WBCs to replenish varies from person to person. If you’re taking a medication that causes leukopenia, your doctor may adjust the dose that you’re taking. They may also recommend switching to a different medication, if possible. Treating underlying conditions that cause leukopeniaIf you have an underlying health condition that’s causing leukopenia, such as lupus or sarcoidosis, your doctor will develop a treatment plan to manage it. This can help to return your WBCs to typical levels. AntimicrobialsYou may be prescribed medications to prevent an infection or to clear up an existing infection. Some examples include antifungals to treat fungal infections or antibiotics to treat bacterial infections. Growth factorsGranulocyte colony-stimulating factor and other growth factors derived from bone marrow can help your body to produce more WBCs. Some examples of growth factors that may be used include filgrastim (Neupogen) and pegfilgrastim (Neulasta). You can’t prevent leukopenia, but can you can take actions to prevent infections when your WBC count is low. Preventative actions include eating well, resting, and avoiding injuries and germs. DietYou may have heard of eating an immunocompromised diet, also called a low-bacterial diet or neutropenic diet, if your WBCs are very low. This diet is thought to reduce your chances of getting germs from food or because of the way food is prepared. However, support for the effectiveness of this diet is lacking. Two 2019 reviews found that the available evidence doesn’t support the use of eating an immunocompromised diet and that such a diet isn’t associated with a decreased infection risk. Nevertheless, if your WBC counts are low, there are some types of food items that you should try to avoid. These include:
It’s also vital to focus on safe food handling in order to reduce your risk of infection. Some tips include:
LifestyleThere are also ways that you can take care of yourself at home when your WBCs are low. For instance, try these tips to feel better and avoid infections:
Leukopenia is when the levels of WBCs in your blood are lower than average. People with leukopenia are at an increased risk for infections. In fact, you may not know that you have leukopenia until you develop symptoms of an infection like fever or chills. A variety of conditions can cause leukopenia, including certain types of cancer, infectious diseases, and autoimmune diseases. If you’re at risk of developing leukopenia, your doctor will routinely check your WBC count to help lower your chance of complications. Depending on the cause, leukopenia can be treated in several ways. While your WBC count is low, you can also make dietary and lifestyle changes to help reduce your risk of infection. If you have leukopenia and symptoms of an infection, contact your doctor right away. What causes low white blood cell count and low neutrophils?A low white blood cell count usually is caused by: Viral infections that temporarily disrupt the work of bone marrow. Certain disorders present at birth (congenital) that involve diminished bone marrow function. Cancer or other diseases that damage bone marrow.
What cancers cause low WBC and neutrophils?Causes of neutropenia
Cancers that affect the bone marrow directly, such as leukemia, lymphoma, and multiple myeloma. Cancer that has spread. Radiation therapy to several parts of the body or to bones in the pelvis, legs, chest, or abdomen.
Should I be worried about low neutrophils?When looking at your risk of getting an infection, doctors look at the number of neutrophils you have. If your neutrophil count is low, the doctor may say you are neutropenic. For most people with cancer, having a low neutrophil count is the biggest risk factor for getting a serious infection.
Why would your neutrophils be low?Causes of a low neutrophil count include: Infection (hepatitis, tuberculosis, sepsis, Lyme disease). Chemotherapy. Bone marrow disorder (leukemia).
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