引言淋巴细胞在体内的功能之一,是直接地或通过转化产生更具有免疫学活性的子细胞而对抗原刺激起反应。淋巴细胞转化能力的减弱、或其有丝分裂前死亡,都将减弱机体对免疫原性刺激物的反应能力。在放射治疗过程中,白细胞数下降(包括淋巴细胞)低于标准水平,是应该中止或延期放疗的一种指标。 INTRODUCTION One of the functions of lymphocytes in the body is to respond to antigenic stimuli directly or through transformation to produce more immunologically active daughter cells. Loss of lymphocyte transformation, or death before mitosis, will reduce the body’s ability to respond to immunogenic stimuli. In the course of radiation therapy, the decrease in the number of white blood cells (including lymphocytes) is lower than the standard level, and it is an indicator that the radiation should be suspended or delayed.