[Evaluation of primary multiple cancer manifesting exposure to asbestos]

Twenty five cases (71%) of 35 primary multiple cancer, confirmed by autopsy, were proved to have been exposed to asbestos. Of these cases, lung and stomach cancers, which were related to the asbestos exposure, were main component of the multiple cancers. Thirteen of these cases had definite occupational histories of asbestos exposure and the number of asbestos bodies in five grams of autopsied wet lung tissue amounted to more than 1000. This result suggests that asbestos exposure might possibly induce a high incidence of multiple cancers.