Exams and Tests

Because the symptoms of leukemia are nonspecific and the causes are not clearly defined, one’s health care provider will carry out extensive interviews and any appropriate tests in order to identify the underlying cause.

• The health care provider will ask many questions about symptoms, current medical situations, medications, medical and surgical history, family history, work history, and habits and life style.
• The physical examination includes a thorough evaluation of all symptoms, not merely lymph nodes and/or possible enlargements of the liver and spleen.Blood tests: Blood is drawn from a vein in order to check the blood cell counts. In most cases of leukemia, the white blood cell count is very high (although it is not uncommon for the white cell count to be normal in many of the childhood acute lymphocytic leukemias) and the platelet and red cell counts are low.This makes the health care provider consider leukemia as the diagnosis. Other tests are performed to check liver and kidney functions and the possible presence of leukemic cells in the spinal fluid.

  Biopsy: Because other conditions may give rise to atypical white cell counts, the only way to confirm the diagnosis of leukemia is via an aspirate and biopsy of the bone marrow.

• Biopsy means to take a small sample of the relevant tissue to check for abnormal cells. In leukemia, a biopsy of the bone marrow must be taken and examined.
• This procedure is usually performed in the medical office, usually by a specialist trained in the treatment of blood disorders, that is, a hematologist or a hematologist-oncologist. The procedure is brief (less than a few minutes) and preceded by a local injection for relief of pain.
• Samples of both liquid (aspirate) and solid bone marrow (biopsy) are taken, usually from a hip bone.
• The bone marrow is examined under a microscope, where the presence of leukemic cells confirms the suspected diagnosis.
  • Genetic studies: The chromosomes of the abnormal cells are examined to look for irregularities. This helps in classifying the various types of leukemia.
  • Lumbar puncture (spinal tap): Because the collection of leukemia cells in the central nervous system can affect mental processes, it is extremely important to know whether the fluid surrounding the brain and spinal cord (cerebrospinal fluid) is affected.

• This procedure is referred to as a lumbar puncture or spinal tap and is usually carried out by the blood specialist in the office. After the procedure, the person needs to lie flat for 1-2 hours.
• A small amount of the fluid is removed from the area around the spinal cord by inserting a hollow needle in the back at around the waist level. The needle is inserted in between the bones in the spine following a small injection into the skin over the injection site in order to minimize discomfort.

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