Abstract
A case of pleomorphic adenoma with cystic lesion developed on an area of the left cheek in a 65-year-old woman is reported.
Clinical examination revealed a nontender, fluctuant swelling approximately 3-4cm in diameter in the left cheek, and approximately 9 ml of viscous fluid containing cholesterol crystals was aspirated. A contrastradiography and computed tomography of the maxillary area
showed a well defined, uniloculated cystic lesion in the soft tissue around the left maxillary area. The provisional clinical diagnosis was a cyst of soft tissue in the cheek.
The lesion was enucleated under local anesthesia.
Histologic examination of the specimen revealed a cystic lesion lined with columnar or squamous epithelium and a neoplastic lesion in an area of th cyst wall which consisted of ductlike tubules of columnar and cuboidal epithelial cells, with some areas of solid proliferation of polygonal cells in a hyalinized connective tissue stroma.
Histopathological diagnosis was pleomorphic adenoma with cystic lesion. In the large cystic formation in pleomorphic adenoma in this case it is assumed that degeneration of the tumor cells followed squamous metaplasia, or mucous retention resulted in obstruction of ducts by the tumor. No recurrence was evident during a follow-up period of three years.
