Abstract
The upper lip is an uncommon site for pleomorphic adenoma. Twenty-five cases were reported between 1997 and 2016 in the pathology service that was the source of this case report. A 37-year-old male presented at a dental office, complaining of an asymptomatic swelling on the upper lip. An intraoral exam showed a sessile submucous node, about 2 cm in diameter, on the upper lip, involving the frenum. With the diagnostic hypotheses of pleomorphic adenoma and mucocele, an excisional biopsy was performed. Transoperative management revealed an encapsulated lesion. The surgical specimen was fixed in 10% formalin and submitted for histopathological analysis. The histopathological examination showed a benign neoplasm of glandular origin characterized by proliferation of luminal and myoepithelial cells, arranged in duct-like structures and sheets, in a myxoid stroma. The final diagnosis was pleomorphic adenoma. The patient was followed up 5 months after the surgical procedure; no recurrence was observed.
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