Wu RY, Chiang H, Shao BJ, Li NG, et al.
Mice were divided into 4 groups in this experiment. One group served as controls. A second was injected once per week with dimethylhydrazine (DMH), which induces colon cancer. A third group was also given DMH, plus radiation with 2.45 GHz for 3 hours daily, 6 days per week for 5 months. The average SAR was 10-12 W/kg. The fourth group was given DMH and a tumour promoter, TPA, which was injected once per week for 10 weeks.
The incidence of tumours was the same in the three test groups. The authors stated that the radiation did not promote DMH-induced colon cncers in the mice.