Pan mean all or whole and cytopenia means lack of cells circulating in the blood. The term pancytopenia refers to the simultaneous development of a number of blood-related deficiencies including non-regenerative anemia, leucopenia, and thrombocytopenia.
Nonregenerative anemia is a condition of low red-blood cell count and the bone marrow is unable to produce additionally needed red-blood cells. Leucopenia is a low white-blood cell count. Thrombocytopenia is a low platelet and thrombocyte count.
The symptoms depend on the underlying cause of pancytopenia. Leucopenia is characterized with repeated episodes of fever, and frequent, persistent infections while a low red-blood cell resulting in anemia is characterized with lethargy and pale gums. Low platelet count due to thrombocytopenia may lead to tiny pinpoint bruises, or bleeding from the mucous membranes.