Abstract
Nasal cancers occur in experimental animals following chronic exposure to a wide range of inhaled chemicals. Although exposure to several of these chemicals is common in industrial as well as domestic environments, epidemiological studies have not provided convincing evidence that exposure to these chemicals individually is associated with nasal cancer in humans. The reverse seems to be true for inhalation of chemical mixtures. The evidence for nasal carcinogenicity of inhaled chemical mixtures in experimental animals is very limited, while there is ample evidence in humans that occupational exposure to certain chemical mixtures is associated with increased risk of nasal cancer. Examples of such (complex) chemical mixtures are wood dust, textile dust, chromium- and nickel-containing materials and leather dust. It is remarkable that these mixtures are aerosols, suggesting that a `dusty working environment' may increase nasal cancer risk.
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