ObjectiveTo explore the value of computed tomographic dacryocystography(CT-DCG)and computed tomographic three-dimensional(3D)reconstruction in diagnosis and treatment of patients with nasal structural abnormality accompanied by asymptomatic lacrimal flow.MethodsA total of 18 nasal structural abnormality patients with asymptomatic lacrimal flow and nasal obstruction were enrolled in the present study. All the 18 cases had hypertrophic inferior turbinate and 12 cases also had nasal septum deviation. The lacrimal flow caused by ocular diseases was excluded. All the patients received radiofrequency ablation of the inferior turbinate under nasal endoscope, and the 12 patients also received nasal septum deviation surgery. The CT-DCG and 3D reconstruction were done preoperatively and postoperatively. All the patients were followed-up for 12 months.ResultsCT-DCG and 3D reconstruction could clearly display the anatomy of lacrimal duct and the surrounding tissues. Preoperative image showed obstruction of orifice of the nasolacrimal duct; postoperative image showed patent lacrimal duct and the contrast medium could flow out from the nasal passage. All the 18 cases had the nasal septum at the middle line, with shrunk inferior turbinate. The nasal obstruction recovered in 14(77.8%) patients and improved in 4(22.2%) patients. The symptom of epiphora disappeared in 13(72.2%) and improved in 5 cases(27.8%).ConclusionCT-DCG and 3D reconstruction of lacrimal duct is valuable for clinical management of patients with nasal structural abnormality accompanied by asymptomatic lacrimal flow.