Adenoma pleomórfico em glândula parótida acessória: Relato de caso e revisão de literatura

Abstract

Pleomorphic adenoma (PA) is the most common benign lesion of the salivary glands, affecting mainly the parotid gland (GP). The accessory parotid gland (GPA) is a salivary tissue separate from the GP and has also PA as the main benign neoplasm that affects it. The objective of this work is to report a case of PA diagnosed in GPA at the UFC-Sobral Stomatology clinic, and to review the literature about its occurrence in this structure, as well as to analyze the registered cases. The articles were searched in PubMed with the keywords “pleomorphic adenoma” and “accessory parotid gland”, resulting in 39 articles. After the exclusion and inclusion criteria were applied, 14 remained. Of the case, this is a female patient, 20 years old, normossystemic, with a complaint of increased volume for about 18 months. On clinical examination, there was a mobile nodule, palpable intraorally and extraorally, located in the buccal mucosa, firm consistency, asymptomatic, well-defined contours and without associated lymphadenopathy. Ultrasonography revealed a rounded hypoechoic image, without associated vascularization, in the angle region of the left mandible. In view of this condition, an excisional biopsy of the lesion was performed under local anesthesia in an outpatient setting. In the intraoperative period, a nodular, encapsulated lesion was observed, whose location suggested origin from GPA. Upon histopathological analysis, the conclusive diagnosis was AP. After complete excision with preservation of the capsule, the patient is undergoing stomatological follow-up with no clinical signs of lesion recurrence and a very satisfactory scarring appearance.