Abstract: Objective To observe the efficacy of endoscopic dacryocystorhinostomy for congenital lacrimal point hypoplasia with lacrimal sac mucocele. Design Retrospective case series. Participants 13 cases (17 eyes) with congenital lacrimal dot dysplasia and lacrimal sac mucocele underwent endoscopic dacryocystorhinostomy in Nanjing Aier Ophthalmic Hospital from 2004 to 2021, with an average age of (8.1±14.2) years (range: 6 days to 43 years). Method Medical records of patients were reviewed. All patients underwent endoscopic dacryocystorhinostomy. The mean follow-up was (20.0±15.7) months. The successful operation was defined as that the cyst disappeared and the diameter of nasolacrimal sac anastomosis was 1.0 mm or larger. Main Outcomes Measure Surgical success rate and complications. Results At the last follow-up, the success rate was 94.1% (16/17 eyes) and the failure rate was 5.8% (1/17 eye). One case had nasal septal mucosa injury during operation, and 1 month after operation there was adhesion between the mucosa of lacrimal sac anastomosis area and nasal septum. The adhesion was separated with gelatin sponge, and the anastomotic hole was formed 2 months later. One case of lacrimal cyst recurred 1.5 months after operation, and free dead bone was found on the foramen area. Conclusions Endoscopic dacryocystorhinostomy for the treatment of congenital lacrimal insufficiency with lacrimal sac mucocele is a good method. However, the lacrimal passage bypass drainage and intubation operation still needs to be carried out in stage II. （Ophthalmol CHN, 2022, 31: 286-291）

Key words: congenital hypoplasia of lacrimal dots, dacrocyte mucocele, endoscopic dacryocystorhinostomy