Carcinoma mucoepidermoide associado a adenoma pleomorfico em glândula paró

Abstract

Pleomorphic adenoma is the most common type of benign tumor in the salivary glands. In generally, it presents clinically as a single nodular lesion, solid, with a well-defined margin, hardened, painless, mobile thru palpation and slow growth pattern. The symptoms rely mainly on the size, location and potential for malignant transformation. On the other hand, mucoepidermoid carcinoma is a malignant tumor and represents half of all malignant diseases of the parotid having a wide variation in pathological and clinical behavior. The objective of this study is to report a clinical case of pleomorphic adenoma of the parotid gland that was becoming malignant in mucoepidermoid carcinoma, where it was decided to perform a surgical excision exclusively, since it had a well delimited margin. White female patient, 49 years old, denies harmful habits, sought care with complaints of swelling on the left side for 2 years, in addition to presenting changes in facial nerve function at clinical examination. After performing the CT scan for surgical planning, the excision procedure was performed, preserving the parotid duct and facial nerve functions. After analyzing the lesion, the result was pleomorphic adenoma but it was already becoming malignant in mucoepidermoid carcinoma. It has been observed in the present clinical case that a pleomorphic adenoma after 2 years without adequate treatment can progress to a malignant tumor such as mucoepidermoid carcinoma.