<unk>  is a cancer that starts in the tissue that forms blood. To understand cancer, it helps to know how normal blood cells form. Most blood cells develop from cells in the bone marrow called stem cells. Bone marrow is the soft material in the center of most bones. Stem cells mature into different kinds of blood cells, and each kind has a special job. White blood cells help fight infection - there are several kinds of these cells. Red blood cells carry oxygen to tissues throughout the body. Platelets help form blood clots that control bleeding. White blood cells, red blood cells, and platelets are made from stem cells as the body needs them. When cells grow old or get damaged, they die, and new cells take their place.
In a person with<unk> , the bone marrow makes abnormal white blood cell, also known as<unk>  cells. Unlike normal blood cells,<unk>  cells do not die when they should. They may crowd out normal white blood cells, red blood cells, and platelets. This makes it hard for normal blood cells to do their work.
Leukemia
Agranulocytosis
Granulocytosis
Leukopenia
Myeloid leukemia
Acute myeloid leukemia
Aleukemic leukemia
Myelofibrosis