Abstract: Objective To observe the efficacy of nasal endoscopic surgery on congenital dacryocystocele. Design Retrospective case series. Participants A total of 131 children with congenital dacryocystocele admitted to Shaying Hospital, Ma'anshan, Anhui Province, Nanjing Aier Eye Hospital, and Jinzhou Aier Eye Hospital from January 2018 to January 2021 were included. Methods The patients' data were reviewed, and all patients underwent nasal endoscopic surgery (nasal cyst endoscopic marsupialization or endoscopic intranasal dacryocystorhinostomy). The follow-up time was 3 to 24 months, with an average of (14.3±2.1) months. Cure was defined as the disappearing of the mass, overflow of tears, and breathing difficulties; improvement was defined as the disappearance of mass, overflow empyema, and the presence of residual tears (due to trocar andtears puncture); unhealed was defined as the presence of overflowing pus and tears. Main Outcomes Measures Cure rate, improvement rate and complications. Results No serious intraoperative complications (such as bleeding and tissue damage) and postoperative complications (bleeding, infection, and hole atresia) were found. 85.5% cases (112/131 cases) were postoperatively cured; 14.5% cases (19/131 cases) were improved after surgery. Conclusion Nasal endoscopic surgery is relatively safe, with high success rate for treatment of congenital dacryocystocele. (Ophthalmol CHN, 2024, 33: 71-75)

Key words: congenital dacryocystocele/surgery, nasal endoscopy