What is Blood Cancer? Blood cancer refers to all malignancies of the blood, bone marrow, and lymphatic systems taken collectively. Usually starting in the bone marrow, the site of blood production, it interferes with the normal flow of events and the capacity of blood cells. The production of healthy blood cells—essential for delivering oxygen, battling infections, and stopping bleeding—is hampered by the uncontrolled proliferation of dangerous cells. Knowing how these malignant cells alter blood cell production and capacity is essential to understanding the causes of blood cancer. Serious systemic symptoms result from the quantity and quality of blood cells being…