- 29 - PRIVACY ACT MATERIAL REMOVE D t - , et al v. NUMEC. gettled out-of-court. This suit was eventually A discussion of the evidence in this @ase by one of the authors is presented in the Appendix B ef this report. These two cases, drawn from the relatively small number of individuals so contaminated, strongly Suggest that Pu-239 particles offer a unique carcinogenic risk. They indicate that a single particle is capable of delivering an intense radiation dose to a critical volume of tissue and that this disruptively irradiated tissue, like an atrophied hair follicle, has a high probability (maybe as high as 1/1000) of becoming cancerous, Cc. Relatec Luna Experiments * The skin experiments with animals are remarkable in that & highly disruptive dose of radiation to a small portion of repairable mammalian tissue produced frequent carcinogenesis. The chance of producing one cancer per animal is essentially unity. It is reasonable to expect that a comparable Gevelopment could occur in lung tissue. While a number of Fadioactive substances have been used to induce lung cancers 48 in mice and rats, it is difficult to derive any characterization of carcinogenesis from these experiments. . PRIVACY ACT MATERIAL REMOVED = 48/ Comber, H., “Radioaenic lung cancer,“ t Proaress in ’ Experinental Turor Research, Hafner Publishing Company, F. Homburager, Inec., Vol. ec. New York, 4, 1964, pp. 251-300.