When 100% of 50% of a tumor volume was irradiated in a single dose of 10 Gy or 20 Gy using X-RAD 225C with a 2 × 2 collimator, there were infiltrations of CD8+ T cells in both irradiated and nonirradiated parts of the tumor at 24 hours after 10-Gy irradiation [9]. Here, CD8A is linked to neoplasm.