Higher than expected incidences of urothelial and renal cell tumours were found in a group of underground copper miners with high exposures to explosives containing dinitrotoluene. Categorization of the renal cell tumour cases by exposure revealed no dose-dependency concerning explosives and was similar to that of a representative group of formerly dinitrotoluene-exposed workers, whereas the urothelial tumour cases were predominantly confined to the high-exposure categories. These results along with results of genotyping indicate the possibility of human carcinogenicity of dinitrotoluene with regard to urothelium as the target tissue.

Support: Paper