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.

Leukemia is caused by genes in the bone marrow cells not working properly.