Leukemia
Leukemia is a type of cancer that begins in the bone marrow and later spreads to the bloodstream. Swollen lymph nodes, fever, and fatigue are common symptoms of leukemia.
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Acute Lymphoblastic Leukemia (ALL)
Leukemia is a type of cancer that forms in your bone marrow, the soft, spongy tissue inside your bones where blood cells are produced. In Acute Lymphoblastic Leukemia (ALL), the bone marrow produces too many malignant, immature white blood cells called blasts. ALL is "acute" because it is aggressive and progresses quickly. "Lymphocytic" refers to the type of white blood cell (lymphoblasts) that give origin.
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Acute Myeloid Leukemia (AML)
In Acute Myeloid Leukemia (AML), too many of the blood-forming stem-cells in your bone marrow develop into abnormal, immature white blood cells called "myeloblasts." AML is "acute" because it is very aggressive and progresses rapidly. AML is "myeloid" because the myeloblasts develop from myeloid stem cells.
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Childhood Leukemia
Leukemia is the most frequently diagnosed cancer in children. More than 30% of all childhood cancers are leukemias. Leukemia is a type of cancer that forms in the bone marrow, the soft, spongy tissue inside the bones where blood cells are produced.
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Chronic Lymphocytic Leukemia (CLL)
In Chronic Lymphocytic Leukemia (CLL), the bone marrow produces too many malignant white blood cells. CLL is "chronic" because it is slow-growing and not very aggressive. "Lymphocytic" refers to the type of white blood cell (lymphocytes) affected.
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Chronic Myeloid Leukemia (CML)
Most people develop CML because of a genetic mutation called the Philadelphia chromosome, in which DNA is transferred between two chromosomes, usually 9 and 22. When DNA is swapped between these chromosomes, an extra-long and an extra-short chromosome result. Abnormal chromosome 22 is the extra-short chromosome, called the Philadelphia chromosome.
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Hairy Cell Leukemia
In hairy cell leukemia, your bone marrow makes too many abnormal B-cell lymphocytes, a type of white blood cell that fights infection. The abnormal lymphocytes in hairy cell leukemia have projections on their surface that make them look hairy under a microscope. Hairy cell leukemia progresses very slowly compared to other forms of leukemia; however, the abnormal cells can eventually build up in your body and invade your blood, lymph nodes, and other organs, such as the spleen.
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Myelodysplastic Syndrome (MDS)
In myelodysplastic syndrome (MDS), your bone marrow does not produce enough health blood cells. Instead, your blood-forming stem cells develop into immature cells called blasts. These blasts do not function properly and eventually die in your bone marrow and bloodstream, crowding out your healthy blood cells and leaving less room for them to form.
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