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To compare endoscopic dacryocystorhinostomy (endo-DCR) + septoplasty with endo-DCR alone and determine the relationship between sinusitis and endo-DCR surgery results. Our study included 55 patients with nasolacrimal duct obstruction (NLDO) between June 2017 and June 2019. Patients were divided into two groups as endo-DCR alone and endo-DCR + septoplasty. Patients' symptoms were thoroughly evaluated and scored using the Lund-Mackay (LM) score and the Lund-Kennedy (LK) system. According to LK endoscopy scoring; those with a score of 0 were determined as group 1 (40 (58.8%) cases); and those with a score greater than 0 were determined as group 2 (28(41.2%) cases). According to LM CT scoring system, cases whose score was 0 were determined as group 1 (44(%66.2) cases); those greater than 0 were determined as group 2 (23(33.8%) cases). A total of 68 endo-DCR surgeries, 42 unilateral and 13 bilateral, were performed. Forty one cases (60.3%) were managed with endo-DCR alone, and septoplasty surgery was performed in 27 (39.7%) cases in addition to endo-DCR due to septum deviation. There was no statistically significant difference in functional and anatomical success between the two groups in terms of surgery type (anatomical success p =.353, functional success p =.528); LK endoscopy scoring (anatomical success p =.956, functional success p =.925) and LM CT scoring system (anatomical success p =.202, functional success p =.172). LK endoscopy and LM CT scores did not show any influence on functional and anatomic outcomes in endo-DCR cases. [ABSTRACT FROM AUTHOR]