Oncocytoma of an Intraoral Minor Salivary Gland: Case Report and Review of Literature

ABSTRACT

Oncocytoma is a rare benign tumor of the salivary glandrepresenting not more than 1% of salivary tumors. It iscomposed of large epithelial cells, the oncocytes, whichare predominantly found, in senior adults, being moreprevalent in the eighth decade of life. It is located mainlyin larger salivary glands especially in parotid glands.The tumor usually presents as a solid mass, painless, ofslow growth, and rarely it is larger than 4 cm ofdiameter. There are few reports in literature on minorsalivary glands neoplasias. This work aims to presentand discuss a clinical case of a 71-year-old male patientwith a 20 X 10 mm asymptomatic nodular lesion, ofapproximately 14 years duration, located in the oralmucosa on the left side of the mouth, with clinical andsurgical diagnosis of fibroma. An excisional biopsy ofthe lesion was made and the specimen was embedded in10% formaldehyde solution and delivered to the OralPathology Laboratory of the Federal University ofPernambuco for analysis. The histopathologicalexamination was carried out by hematoxylin/eosin andPAS staining with and without diastase. The specimenwas diagnosed as a minor salivary gland oncocytoma.