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Updated: Aug 6, 2026

Transcanalicular Diode Laser-assisted Dacryocystorhinostomy for the Treatment of Primary Acquired Nasolacrimal Duct Obstruction
Published on: October 13, 2017
Massive enlargement of the nasolacrimal canal causing epiphora and chronic maxillary sinusitis
1Department of Otolaryngology-Head & Neck Surgery, St. Louis University School of Medicine, 3635 Vista Avenue, St. Louis, MO 63110, USA.
Objectives:
Enlargement of the nasolacrimal canal (NLC) is a rare anatomic variant. We present the first report of a massively dilated NLC causing epiphora and chronic sinusitis.
Methods:
The authors conducted a literature review and case report.
Results:
A 65-year-old man with refractory sinonasal symptoms and a remote history of a dacryocystorhinostomy was found to have a massively dilated, air-filled NLC. Using a combined endoscopic transnasal and endoscope-assisted Caldwell-Luc approach, the posterolateral wall of the NLC was removed. The patient's symptoms were improved 10 months postoperatively.
Conclusions:
Symptoms suggestive of nasolacrimal dysfunction should prompt a search for potential sinonasal pathology.
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