Leukemia is a type of cancer that develops in the bone marrow. With acute myeloid leukemia (AML), the bone marrow makes abnormal myeloid cells that are precursors to blood cells, including:

  • Myeloblasts (a type of white blood cell) that fight infection
  • Red blood cells that carry oxygen
  • Platelets that make blood clots and stop bleeding in cuts and bruises

The leukemia cells do not function normally. They cannot do what normal blood cells do, like fight infections. The abnormal cells also overgrow the bone marrow, forcing normal cells out. Without normal cells, anemia and bleeding problems develop. They also cannot fight infections properly.

White Blood Cells
White Blood Cells
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Cancer occurs when cells in the body divide without control or order. Normally, cells divide in a regulated manner. If cells keep dividing uncontrollably when new cells are not needed, a mass of tissue forms, called a growth or tumor. The term cancer refers to malignant growths. These growths can invade nearby tissues. Cancer that has invaded nearby tissues can then spread to other parts of the body.

It is not clear exactly what causes these problems in the cells, but it is probably a combination of genetics and environment.