The aim of this work is to study the etiological factors of failures after endonasal endoscopic dacryocystorhinostomy (EEDCR). We retrospectively studied the case reports of 485 patients (521 cases) with a relapse after EEDCR performed for primary dacryocystitis. The obtained data allowed us to reveal that the largest number of cases of relapse after EEDCR was a consequence of partial or complete obliteration of dacryocystorhinostomy (DCR) ostium (278 cases), which amounted to 53.3% of all analyzed cases. In 127 cases, the reason of recurrence after EEDCR was stenosis or obliteration of the common canaliculus ostium (24.4%). In 116 cases (22.3%), relapse after EEDCR was caused by a combination of several etiological factors. Of these, in 86 cases, synechiae and granulation in the area of dacryostomy were revealed. The retrospective analysis carried out within the framework of this work, based on the study of the results of the applied diagnostic methods, including multislice computed tomography with contrast enhancement of lacrimal drainage system, made it possible to determine and systematize the etiological factors of the development of repeated obstruction of the lacrimal drainage system after EEDCR. Key words: relapse, dacryocystitis, DCR, common canaliculus ostium, DCR ostium, synechiae.
The Surgical Outcome of Endoscopic Dacryocystorhinostomy According to the Obstruction Levels of Lacrimal Drainage System
