Adult acute myeloid leukemia (AML) is a disease in which cancer (malignant) cells are found in the blood and bone marrow. AML is also called acute nonlymphocytic leukemia or ANLL. The bone marrow is the spongy tissue inside the large bones in the body. The bone marrow makes:
Normally, the bone marrow makes cells called blasts that develop (mature) into several different types of blood cells. Each have specific jobs to do in the body. AML affects the blasts that are developing into white blood cells called granulocytes.
In AML, the blasts do not mature and become too numerous. These immature blast cells are then found in the blood and the bone marrow. Leukemia can be acute (progressing quickly with many immature blasts) or chronic (progressing slowly with more mature looking cancer cells). Acute myeloid leukemia progresses quickly. AML can occur in adults or children.
AML is often difficult to diagnose. The early signs may be similar to the flu or other common diseases. A doctor should be seen if the following signs or symptoms won't go away:
If there are symptoms, a doctor may order blood tests to count the number of each of the different kinds of blood cells. If the results of the blood tests are not normal, a doctor may do a bone marrow biopsy . During this test, a needle is inserted into a bone and a small amount of bone marrow is taken out and looked at under a microscope. A doctor can then tell what kind of leukemia is present and plan the best treatment. The chance of recovery (prognosis) depends on the type of AML and the patient's age and general health.
There is no staging for AML. The choice of treatment depends on whether the patient has been treated.
Untreated
Untreated AML means no treatment has been given except to treat symptoms. There are too many white blood cells in the blood and bone marrow, and there may be other signs and symptoms of leukemia. Rarely, tumor cells can appear as a solid tumor called an isolated granulocytic sarcoma or chloroma.
In remission
Treatment has been given, and the number of white blood cells and other blood cells in the blood and bone marrow is normal. There are no signs or symptoms of leukemia.
Recurrent/refractory
Recurrent disease means the leukemia has come back after going into remission. Refractory disease means the leukemia has not gone into remission following treatment.
There are treatments for all patients with AML. The primary treatment of AML is chemotherapy. Radiation therapy may be used in certain cases. Bone marrow transplantation and biological therapy are being studied in clinical trials.
Treatment for adult AML depends on the type of AML, the patient's age and overall health. Standard treatment may be considered based on its effectiveness in past studies, or participation in a clinical trial may be considered. Not all patients are cured with standard therapy, and some standard treatments may have more side effects than are desired. For these reasons, clinical trials are designed to find better ways to treat cancer patients and are based on the most up-to-date information. Clinical trials are ongoing in most parts of the country for most stages of adult AML. For more information, call the Cancer Information Service at 1-800-4-CANCER (1-800-422-6237); TTY at 1-800-332-8615.
Untreated adult acute myeloid leukemia
Treatment will probably be systemic chemotherapy. If leukemia cells are found in the brain, chemotherapy will be injected directly into the spinal cord (intrathecal). Clinical trials are testing new drugs.
Adult acute myeloid leukemia in remission
Treatment will most likely be:
Recurrent adult acute myeloid leukemia
Radiation therapy may be given to reduce symptoms. Patients may also choose to take part in clinical trials of new chemotherapy drugs or bone marrow transplantation.
Source:
The National Cancer Institute, May 2001
Last reviewed May 2001 by EBSCO Publishing Editorial Staff
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