The Ki-67 labeling indices in tumor tissues were 60.7 ± 10.8, 60.3 ± 13.4, and 59.1 ± 19.4% at 6 hrs, 57.7 ± 12.3, 54.8 ± 10.9, and 55.5 ± 16.2% at 24 hrs, 58.2 ± 23.1, 58.7 ± 14.6, and 54.2 ± 14.3% at 48 hrs, and 63.0 ± 20.4, 60.6 ± 15.6, and 59.3 ± 11.9% on day 7 in the non-radiation-treated control and the 10- and 20-Gy radiation-treated groups, respectively (Figure 6B). The gene discussed is MKI67; the disease is neoplasm.