What type of cancer is characterized by the uncontrolled growth of blood cells?

Leukemia is characterized by the uncontrolled growth of blood cells, specifically white blood cells. This type of cancer originates in the bone marrow, where blood cells are produced, leading to the overproduction of abnormal or immature cells that disrupt normal blood function. These abnormal cells can crowd out healthy cells, impairing the body’s ability to produce red blood cells, platelets, and other essential components of the blood.

Myeloma involves the plasma cells, a type of white blood cell that produces antibodies, and while it also results in uncontrolled cell growth, it primarily affects these specific cells rather than all types of blood cells. Carcinomas and sarcomas, on the other hand, are types of cancer that originate in epithelial and connective tissues, respectively, and do not specifically involve blood cells. Thus, leukemia is the most accurate choice for the question regarding uncontrolled growth of blood cells.