BACKGROUND To investigate the therapeutic effectiveness and safety of endoscopic dacryocystorhinostomy (EN-DCR) to treat congenital nasolacrimal canal dysplasia (CNCD). METHODS Forty children (50 eyes) with congenital nasolacrimal duct obstruction (CNLDO) and lacrimal bony dysplasia, including 8 children with bony atresia (10 eyes) and 32 with bony stenosis (40 eyes), were recruited in this retrospective study. Standardized EN-DCR was performed in all cases. The postoperative observations included relief of symptoms, fluorescein dye disappearance test (FDDT), syringing of lacrimal passages and anastomotic patency under nasal endoscopy. Patients were followed up for 8-18 months. RESULTS Standardized EN-DCR surgery had a success (cure and improvement) rate of 100%, including a cure rate of 82% and an improvement rate of 18%. The cure rate among 40 cases of bony nasolacrimal duct stenosis was 82.5%, while that of 10 cases of bony nasolacrimal duct atresia was 80%. Statistical analysis showed that nether the receipt of other treatments before surgery nor the type of bony nasolacrimal duct dysplasia affected the cure rate. No significant complications were observed during postoperative follow-up except for four cases (4 eyes) that suffered middle turbinate and nasal mucosal adhesion and two cases with sinusitis. CONCLUSIONS CNCD is a type of CNLDO that does not respond to conservative and conventional treatment. EN-DCR represents a safe and effective treatment for children with CNCD. In addition, the combination of EN-DCR with lacrimal CT scanning provides advantages over traditional lacrimal surgery in that it has a high success rate with a low incidence of complications.

中文翻译：

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内镜下泪囊鼻腔吻合术治疗先天性鼻泪管发育不良：40例儿童的回顾性分析。

背景技术探讨内镜下泪囊鼻腔吻合术（EN-DCR）治疗先天性鼻泪管发育不良（CNCD）的疗效和安全性。方法这项回顾性研究招募了40例先天性鼻泪管阻塞（CNLDO）和泪腺性骨发育不良的儿童（50眼），其中包括8例骨性闭锁（10眼）和32例骨性狭窄（40眼）。在所有情况下均执行标准化的EN-DCR。术后观察包括症状缓解，荧光染料消失测试（FDDT），泪道注射和鼻内窥镜下吻合口通畅。对患者进行了8-18个月的随访。结果标准化的EN-DCR手术的成功率（治愈率和改善率）为100％，其中治愈率为82％，改善率为18％。骨性鼻泪管狭窄症40例治愈率为82.5％，而骨性鼻泪管闭锁症10例治愈率为80％。统计分析表明，术前是否接受其他治疗方法以及骨性鼻泪管发育不良的类型均影响治愈率。术后随访期间未观察到重大并发症，除了四例（4眼）出现中鼻甲和鼻粘膜粘连以及两例鼻窦炎。结论CNCD是一种CNLDO，对保守治疗和常规治疗均无反应。EN-DCR对患有CNCD的儿童而言是一种安全有效的治疗方法。此外，