再生障碍性贫血骨髓活检可见造血成分明显减少，除此之外，网织红细胞和粒细胞通常减少。病因可能是是药物或毒物，有时是感染。不明原因的称为先天性再生障碍性贫血。
Hematopoietic elements in this bone marrow biopsy are markedly reduced. This is a case of aplastic anemia. Of course, besides, RBC's the platelets and granulocytes will often be diminished. Sometimes a drug or toxin is the cause and sometimes infection. When no known cause can be found, it is termed idiopathic aplastic anemia.
