Leukemia is a type of cancer that affects the blood and bone marrow. It is caused by an abnormal growth of white blood cells, which can crowd out healthy cells and make it difficult for the body to fight off infections. A blood test is an important tool for diagnosing leukemia, as it can reveal whether there are abnormal numbers of white blood cells present.
Overview of Blood Tests for Leukemia
A blood test can be used to check for leukemia by looking for abnormal levels of white blood cells. A doctor may order a complete blood count (CBC) to measure the number of different types of white blood cells in the blood. Additionally, a doctor may order a differential white blood cell count, which can provide more detailed information about the types of white blood cells present.
What to Expect During a Blood Test for Leukemia
A blood test for leukemia is typically a quick and painless procedure. A healthcare professional will use a needle to draw a sample of blood from a vein in the arm. The sample is then sent to a laboratory for testing. Results from the test can often be available within a few days.
Interpreting Results from a Blood Test for Leukemia
If the results of a blood test for leukemia indicate abnormal levels of white blood cells, further testing may be necessary to confirm a diagnosis. This may include additional blood tests, a bone marrow biopsy, and a physical exam. A doctor will also consider a person's medical history and symptoms before making a diagnosis.