Methods Inconformity with the method of the treatment all the patients were divided in 2 groups. In the patients of the first group (84 children) the standard endoscopic sinus surgery was performed. This method includes: the relatively large ablation of all the anatomical structures from operation zone (processus uncinatus, ethmoid cells, ostium of sinus maxillary). In the patients of the second group (205 children) the minimally invasive endoscopic sinus surgery was performed. This modification includes partial resection of processus uncinatus and limited ablation of all the anatomical structures of ostiomeatal complex.

Results The duration of the treatment in patients from the I group was 6,15 ± 0, 24 days, in the children from the II group it was4, 26 ± 0,25 days, with statistic differences between the II and the I group (t = 7, 15; p < 0,001). The patients were considered recovered if all the symptoms were absent over a period of 36 months. The good results were determined in 73,7% of the patients in group I and in 85,7% in the group II.

Conclusion The best results were obtained in patients who have undergone the minimally invasive endoscopic sinus surgery.