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Leukemia - acute myeloid leukemia (AML)

Risks
Symptoms
Diagnosis
Prevention

Acute Myeloid Leukemia (AML) is a type of cancer that affects the blood and bone marrow, characterized by the rapid proliferation of abnormal myeloid cells. These cells impede the production of normal blood cells, leading to symptoms associated with anemia, increased susceptibility to infections, and bleeding problems. AML can occur in adults and children and is known for its aggressive nature and poor prognosis if not treated promptly.

Several factors increase the likelihood of developing AML, including age, as it primarily affects older individuals. Genetic predispositions, such as mutations in specific genes, and previous treatments for other cancers, particularly chemotherapy or radiation, can also elevate risk. Exposure to certain chemicals, like benzene, and having certain blood disorders further contribute to the susceptibility to AML.

The onset of AML can be sudden and may manifest through various symptoms, such as fatigue, fever, frequent infections, easy bruising or bleeding, and unexplained weight loss. Other symptoms may include swollen lymph nodes, gum bleeding, and petechiae, which are small red or purple spots on the skin. These symptoms arise due to the infiltration of abnormal cells and the resulting deficiency in normal blood cell types.

Acute myeloid leukemia (AML) arises from the uncontrolled growth of myeloid cells, which are responsible for the production of various blood components. The exact cause of AML is often unknown, but several risk factors have been identified, including exposure to high doses of ionizing radiation, certain chemical exposures (such as benzene), and a history of chemotherapy for previous cancers. Genetic mutations, such as those involving the FLT3, NPM1, and CEBPA genes, may also play a significant role in the development of AML, as can pre-existing blood disorders like myelodysplastic syndromes.

Diagnosing AML involves a combination of clinical evaluation, blood tests, and diagnostic imaging. A complete blood count (CBC) may reveal abnormal levels of white blood cells, red blood cells, and platelets, while a bone marrow biopsy is crucial for confirming the presence of abnormal myeloid cells. Genetic testing may also be performed to identify specific mutations that can guide treatment options.

Treatment for acute myeloid leukemia typically begins with chemotherapy, aimed at inducing remission by killing leukemia cells and restoring normal blood cell production. The most commonly used regimen includes cytarabine combined with an anthracycline drug, such as daunorubicin or idarubicin. In certain cases, targeted therapies, immunotherapies, or hematopoietic stem cell transplantation may be recommended, especially in patients with relapsed disease or those with high-risk genetic features. Supportive care measures, like managing infections and blood transfusions, are also crucial components of the treatment plan.

While there are no proven strategies to completely prevent AML, certain lifestyle modifications may reduce risk. Avoiding exposure to known carcinogens, such as tobacco smoke and industrial chemicals, can be beneficial. Additionally, maintaining a healthy lifestyle through a balanced diet, regular physical activity, and managing coexisting health conditions may contribute to overall well-being and potentially lower the risk of developing blood cancers.