The results of this study showed that the serum IgM and IgA levels of the observation group were lower than those of the control group, and the IgG level was higher than that of the control group, suggesting that the use of Jiawei Danggui Beimu Kushen pills to treat PCa can improve the patient's resistance and enhance the patient's immune function. The gene discussed is CD40LG; the disease is posterior cortical atrophy.