Intraoral salivary duct cyst: Report of rare entity.

Salivary duct cysts (SDCs) are true cysts caused by obstruction of the salivary ducts and are rare in minor salivary glands. A 62-year-old male reported with a painless swelling in the left buccal mucosa for 2 years. Excision of the entire lesion was performed under local anesthesia following which histopathological examination was performed. Microscopically, a dilated salivary gland duct composed of 1-2 layers of cuboidal cells with intraluminal mucous plug was observed. Cystic lumen lined by mucous cells, squamous cells and ciliated cells was seen. Oncocytic metaplasia was also present at various places. Histopathologically, it was consistent with the diagnosis of SDC. Intraoral SDCs and mucoceles clinicopathologically mimic salivary gland neoplasms, making diagnosis difficult and subject to errors in treatment. It is important for oral and maxillofacial surgeons to include SDC in the differential diagnosis of swelling affecting buccal mucosa.