“…Surgical treatment often requires correction of intranasal structures in addition to intervention within one affected sinus [7,8]. The development of new technologies in diagnostics and surgical approaches in CRS allows a different approach to the issue of managing patients with this pathology [9,10,11]. To date, the most common method of treatment for CRS is functional endoscopic rhinosinus surgery (FESS), which makes it possible to open all affected PNSs in the least traumatic and gentle way, remove pathologically contents from them and, at the same time, create conditions for adequate drainage and aeration.…”