Resumo

SALES BRITO, Lívia Natália et al. LARGE POLYMORPHOUS LOW-GRADE ADENOCARCINOMA IN ELDERLY PATIENT: UNUSUAL CASE REPORT. Odontol. Clín.-Cient. (Online) [online]. 2016, vol.15, n.1, pp. 1-4. ISSN 1677-3888.

Polymorphous low-grade adenocarcinoma (PLGA) is a malignant tumor which occurs predominantly in minor salivary glands and exhibits low tendency for aggressive behavior and metastatic spread. The aim of this paper is to report an unusual case of PLGA in an elderly patient, specially because of the large size of the lesion. Furthermore, the main criteria for differential diagnosis between PLGA and other salivary gland neoplasms will be discussed. A 92-year-old male patient, who was a smoker, presented with an asymptomatic tumor on the left portion of the palate, covered by normal mucosa with telangiectatic areas, measuring about 7.4 cm. The diagnostic hypothesis was mucoepidermoid carcinoma and incisional biopsy was done. Histopathologic features were compatible with PLGA and the patient was referred to the head and neck surgeon. PLGA is a malignant salivary gland neoplasm that exhibits low tendency for aggressive behavior and usually presents as a non-tender nodule. Nevertheless, since PLGA can reach a large size, the authors emphasize the importance of an accurate diagnosis of this tumor in order to differentiate it from other neoplasms with different biological behavior and prognosis.

Palavras-chave : Neoplasms; Salivary Glands; Palate; Adenocarcinoma.