Aplastic anemia in the elderly

Aplastic anemia (referred to as aplastic anemia) is a group of bone marrow stem cells or due to chemical, physical, biological factors and unknown causes, and damage to the hematopoietic microenvironment, causing the red pulp to concentrically atrophy, replaced by fatty pulp, the whole blood Reduced blood cells. There were no malignant cells in the bone marrow and no reticular fibrous hyperplasia.