A student asks the professor what the most common pathophysiologic process is that triggers aplastic anemia (AA). What response by the professor is most accurate?
◦ Autoimmune disease against hematopoiesis by activated cytotoxic T (Tc) cells
◦ Malignancy of the bone marrow in which unregulated proliferation of erythrocytes crowd out other blood cells
◦ Autoimmune disease against hematopoiesis by activated immunoglobulins
◦ Inherited genetic disorder with recessive X-linked transmission