Pleomorphic adenoma with extensive squamous metaplasia and keratin cyst formations in minor salivary gland: a case report
J. appl. oral sci
; 19(2): 182-188, May-Apr. 2011. ilus
Article
em En
| LILACS
| ID: lil-586039
Biblioteca responsável:
BR1.1
ABSTRACT
Pleomorphic adenoma (PA), the most common salivary gland tumor, accounts for 54 to 65 percent of all salivary gland neoplasias and 80 percent of the benign salivary gland tumors. It most frequently affects the parotid gland, followed by the submandibular and the minor salivary glands. Microscopically, mucous, sebaceous, oncocytic and squamous metaplasia, sometimes with the formation of keratin pearls, may be present, but the latter rarely results in the formation of extensive keratin-flled cysts lined by squamous epithelium. Extensive squamous metaplasia can be mistaken for malignancy, including mucoepidermoid carcinoma and squamous cell carcinoma. Here, we present an unusual case of PA with extensive squamous metaplasia and keratin cyst formations in a minor salivary gland, and discuss its microscopic features, including the immunohistochemical characteristics, and differential diagnosis of this uncommon presentation.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Glândulas Salivares Menores
/
Neoplasias das Glândulas Salivares
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Adenoma Pleomorfo
Limite:
Adult
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Humans
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Male
Idioma:
En
Revista:
J. appl. oral sci
Ano de publicação:
2011
Tipo de documento:
Article