acquired aplastic pancytopenia的用法和样例：
- The pathophysiology of acquired aplastic anemia can be defined as immunologically mediated decrease in the size of the stem cell compartment.
- idiopathic acquired aplastic anemia
- Oligoclonal lymphocyte expansion is predominant characteristic in patients with acquired aplastic anemia
- Comparison of therapeutic effect between former seven years and latter seven years for the treatment of acquired aplastic anemia