The authors performed epidemiological analysis of malignant neoplasms of the nose, paranasal sinuses, throat, tongue, larynx and salivary glands in Bydgoszcz area. All the patients were treated in the Otolaryngological Clinic of Medical Academy in Bydgoszcz. Patient's sex, age, profession, living and environmental conditions as well as histopathological diagnosis were taken into analysis. The data were referred to various regions of Bydgoszcz province, which were elucidated on the basis of microclimate conditions, industry, soil conditions, density of the forest area, and cultivated agriculture plants. Correlations between occurrence of oral cavity and the upper respiratory tract malignant neoplasms and living conditions as well as kind of profession in different parts of Bydgoszcz province were estimated.
