These cells are irreversibly blocked in their ability to proliferate, although they may perform specialized functions for a long period of time, perhaps with the exception of chronic myelogenous leukemia (CML).

胞在其增殖力方面受到不可逆转阻断，尽管它们可长时间发挥特殊，许慢性髓性白血病（CML）除外。