Objective:This study investigates the association between occupational exposure to trichloroethylene (TCE) and kidney cancer, as this correlation has been questioned.Methods:The incidence of cancers was studied in a dynamic cohort of 997 male workers who for many years had been occupationally exposed to TCE.Results:During a 50-year observation period, 13 cases of kidney cancer were observed (7.5 expected) with a standardized incidence ratio of 1.7 and a 95% confidence interval of 1.0 to 3.0. Four other cases, not included in the SIR analysis, were also observed. Long-term TCE exposure was positively confirmed for 14 of the 17 incident cases. There is reason to assume that the remaining cases also had been exposed to TCE.Conclusions:The present study supports the view that TCE is a kidney carcinogen.
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