Abstract
Nasolabial cyst is a rare, non-odontogenic cyst that occurs in the submucosa of the anterior nasal floor. Its most likely origin is known to be remnants of the nasolacrimal duct. The patient usually comes to the hospital for swelling or pain in the nasolabial area, and the diagnosis is made by combining clinical features, radiologic imaging, and histological test. The most commonly used treatment is surgical excision via sublabial approach. A 40-year-old male, who had undergone maxillary orthognathic surgery for malocclusion 11 years ago, visited our hospital for pain and swelling of the nasolabial folds that had persisted for a year. A large nasolabial cyst with a size of 4.8×3.3×3.1 cm was confirmed on paranasal sinus CT, and surgical excision was performed via sublabial approach. The pathologic finding was a cyst lining consisting of ciliated pseudostratified columnal epithelium and goblet cells, consistent with the characterization of a nasolabial cyst. No recurrence was observed during follow-up for 3 months.
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