This article was designed to report our summarized experience with the surgical treatment of the patients presenting with osteomas of the paranasal sinuses. During the observation period, the bone tumours were detected in 89 subjects at the age varying from 20 to 87 years. Those patients who did not require immediate surgery were classified as a dynamic observation group. Fifty two patients underwent the surgical treatment by means of endoscopic endonasal removal of osteomas of the paranasal sinuses. All the patients underwent complete otorhinolaryngological examination, endoscopic examination of the nose and nasopharynx, computed tomography (cone-ray or multi-spiral CT) of the paranasal sinuses in the pre- and postoperative periods. The additional intraoperative monitoring was performed using an electromagnetic navigation system. The osteomas were reduced with the help of the diamond rhinological drills. In certain cases, a diode laser was applied in the contact mode to reduce the mobilized osteomas. The removed tissues were sent for a morphological study. In 28 patients, the osteoma occurred in the combination with chronic polypous rhinosinusitis. The laboratory studies have demonstrated the isolated enhancement of the erythrocyte sedimentation rate in 4% of the cases. The presence of chronic rhinosinusitis with polyps and the increase in ESR was also documented in 31% of the patients. The tumours were completely removed in all the treated patients as confirmed by the results of computer tomography performed in the postoperative period. In the group of patients available for the dynamic observation, the growth of osteomas was noted in 2 cases, with the size of the neoplasm being increased by 1—1.5 mm during 12 months. Because the localization of these osteomas was not associated with the natural auxillary anastomosis, they were not the cause of the development of the recurrent inflammatory processes in the paranasal sinuses, nor did they produce specific clinical manifestations of their own. Therefore, it was decided to further monitor these patients.