Yin M, Gao X, Di L, et al. - The selection of the studies was carried out using PubMed, MEDLINE, Cochrane Library, and Embase databases to quantify the impact of endoscopic sinus surgery on pulmonary function in patients with cystic fibrosis and chronic rhinosinusitis. Studies investigating pulmonary function outcomes in patients with cystic fibrosis and chronic rhinosinusitis following endoscopic sinus surgery have been involved. In total, 12 studies with 570 patients were involved in data extraction and meta‐analysis. The pulmonary function of chronic rhinosinusitis patients with cystic fibrosis was not improved by endoscopic sinus surgery.