CD8A and posterior cortical atrophy: According to the result, age (P = 0.003), T stage (P = 0.078), the absolute counts of peripheral CD3(+) CD4(+) T lymphocytes (P = 0.002), CD4(+)/CD8(+) ratio (P = 0.030) and CD3(-)CD16(+)CD56(+) NK cells (P = 0.020) were chosen as predictors of patients with PCa (Table 2).