| malignant neoplasms of the nasal cavity and paranasal sinuses: a series of 256 patients in mexico city and monterrey. is air pollution the missing link? | air pollution is a serious health problem in major cities in mexico. the concentrations of monitored criteria pollutants have been above the us national ambient air quality standards for the last decade. to determine whether the number of primary malignant nasal and paranasal neoplasms has increased, we surveyed 256 such cases admitted to a major adult oncology hospital located in metropolitan mexico city (mmc) for the period from 1976-1997 and to a tertiary hospital in monterrey, an industrial ... | 2000 | 10740168 |