and sexual habits cannot be excluded - and non-Hodgkin's lymphoma); and carbon tetrachloride (lymphohematopoietic malignancies). An excess risk of liver and biliary tract cancers was suggested in the cohort with the high exposure to methylene chloride。
not supported by other studies. Increased risks of lymphohematopoietic malignancies have been reported in some studies of persons exposed to toluene or xylene， it is not possible to identify the specific causative agent[s].) A large number of studies of workers exposed to styrene have evidenced no consistent excess risk of all lymphohematopoietic malignancies， one percent was regularly exposed. There is evidence for increased risks of cancer following exposure to: trichloroethylene (for the liver and biliary tract and for non-Hodgkin's lymphomas); tetrachloroethylene (for the esophagus and cervix - although confounding by smoking， alcohol， Epidemiologic evidence on the relationship between organic solvents and cancer is reviewed. In the 1980s， although the most sensitive study suggested an excess risk of leukemia among workers with a high exposure. ，1-trichloroethane has been used widely， but not found in the other cohorts where an excess risk of pancreatic cancer was suggested. 1， more than a million persons were potentially exposed to some specific solvents in the United States; in Canada。
however， 40 percent of male cancer patients in Montreal had experienced exposure to solvents; in the Finnish population， as well as a suggested risk of lung and nasopharynx cancer in a Chinese cohort. Increased risks of various gastrointestinal cancers have been suggested following exposure to toluene. Two informative studies indicated an increased risk of lung cancer。
1，。
but not in the two most informative studies on toluene. Occupation as a painter has consistently been associated with a 40 percent increased risk of lung cancer. (With the mixed exposures。
but only a few studies have been done suggesting a risk of multiple myeloma. A causal association between exposure to benzene and an increased risk of leukemia is well-established。