One of the actual problems of modern otorhinolaryngology is a significant increase in the incidence of paranasal sinuses, in particular acute and chronic sinusitis, which, according to the literature, is 1.5-2% per year. The purpose of our research was to study and compare the frequency of isolated and combined sinusitis of the maxillary and frontal sinuses according to radiographic examination data.100 anonymized radiographs of persons of mature age (50 men and 50 women) who were examined by referral for inflammatory lesions of the paranasal sinuses were analyzed. All images were taken in the occipito-mental projection according to Waters, which allowed visualization of the maxillary and frontal sinuses.Different variants of isolated or combined inflammatory lesions of the maxillary and frontal sinuses were found in the studied sample. Signs of one-or two-sided catarrhal or exudative sinusitis were observed in all processed Xrays. In 84% of the examined persons, a lesion of only the maxillary sinuses was diagnosed, in 16% of the examined, a combined lesion of the maxillary and frontal sinuses was detected. Not a single case of isolated frontitis was found in the studied sample.According to radiographic examination, inflammatory processes in the maxillary sinuses are observed 6 times more often than in the frontal sinuses. Isolated lesions of the maxillary sinuses are found 5 times more often than combined lesions of the maxillary and frontal sinuses.