Pancytopenia is a medical condition in which there is a reduction in the number of white blood cells, red blood cells, and platelets in the blood. The term "pancytopenia" is commonly used in medical circles, but there are other synonyms for this condition. For instance, some medical professionals may use the term "cytopenia" which means a decrease in the number of cells. Another synonym for pancytopenia is "hypocellular bone marrow" which refers to a lack of sufficient bone marrow cells that produce blood in the body. Additionally, "aplastic anemia" is another term used to describe a severe form of pancytopenia in which the bone marrow does not produce enough blood cells.