Surgical Challenges in the Management of Respiratory Epithelial Cyst Involving the Lacrimal Sac.

Respiratory epithelial cysts are uncommon lesions that can be congenital or acquired cystic malformations. Beyond the respiratory system, the location of the respiratory epithelial cyst has been described in the central nervous system, orbits, and the maxillofacial region. The common etiology is believed to be sequestration or entrapment of the epithelial cells of the paranasal sinus. To the best of the authors' knowledge, there are no prior reports on respiratory epithelial cyst involving the lacrimal sac. The present case reports the computed tomography-dacryocystography and endoscopic features and surgical challenges in the management of one such exceptionally rare case.