H2AX and neoplasm: The number of γ-H2AX positive cells in tumor tissue derived from PDMP + RT-treated mice (96.25 ± 4.78%) was significantly higher compared to that of PTX + DDP(IT)+RT-treated mice (76.14 ± 5.76%, p < .05), RT-treated mice (70.88 ± 4.08%, p < .05) and mice in other treatment groups (p < .05 in all cases).