The objective of the work was to evaluate the results of FESS in a group of patients with chronic maxillary sinusitis. Retrospectively the case-records were evaluated and selected 57 patients with chronic maxillary sinusitis (84 maxillary sinuses). The interval after surgery was 12-72 months, on average 30 months. Patients with nasal polyps were not included in the group. The mean CT grading according to Lund in the whole group was 3.8, the mean CT grading in the group of patients without improvement after surgery was 5.9. The mean surgical score in the whole group according to Lund was 4.2, the most frequent operation was uncinectomy with antrostomy and anterior ethmoidectomy which was performed in 45 sinuses. Minimal postoperative complications were recorded in 3 patients. 47 patients (82%) felt better after surgery. 31 patients (54%) after surgery had repeatedly or on a long-term basis medicamentous treatment on account of symptoms of sinusitis. The group of nine surgical failures included five patients where a revision was made and four who did not feel better subjectively and required antibiotics and lavage of the sinuses because of signs of sinusitis. From our aspect 13 patients were cured who were free from complaints after surgery and did not require further medicamentous treatment on account of maxillary sinusitis. FESS is useful within the framework of comprehensive and long-term therapy of chronic sinusitis. Only in some cases it can be the definite solution of chronic maxillary sinusitis.

        Key words: chronic maxillary sinusitis, endoscopic surgery results.