What is the central mechanism in the pathogenesis of aplastic anemia?

Updated: Jan 29, 2021
  • Author: Sameer Bakhshi, MD; Chief Editor: Emmanuel C Besa, MD  more...
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Previously, it had been hypothesized that aplastic anemia may be due to a defect at various levels, such as an intrinsic defect of hematopoietic cells; external injury to hematopoietic cells; and defective stroma, which is critical for normal proliferation and functioning of hematopoietic cells. Theoretically, all of these mechanisms could be responsible for aplastic anemia. This theory was the basis of many in vitro stem cell culture experiments using a crossover design in which stem cells from patients with aplastic anemia were cultured with normal stroma and vice versa. The conclusions from these studies led to the understanding that stem cell defect is the central mechanism in the majority of patients with aplastic anemia. [16, 17]

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