Aplastic anemia occurs when the bone marrow stops producing enough red and white blood cells and platelets.
Anemia consists of decreased hemoglobin levels or number of red blood cells, which carry hemoglobin and oxygen throughout the body.
Neutropenia consists in a decrease in the number of white blood cells, which help fight infection.
Thrombocytopenia is a decrease in the number of blood platelets, which aids coagulation.