Acquired aplastic anemia is a rare, serious blood disorder, due to failure of the bone marrow failure to produce blood cells. Bone marrow is the spongy substance found in the center of the bones of the body, in adults mainly the spine, pelvis, and large bones of the legs.

Aplastic anemia is a life-threatening condition with very high death rates (about 70% within 1 year) if untreated. The overall five-year survival rate is about 80% for patients under age 20.

Patients with more moderately decreased blood counts; may not require treatment. Furthermore, some aplastic anemia that is genetically inherited may, first manifest in adulthood, sometimes without a family history of blood disease.

What is the most common type of anemia and it’s cause?