title: Epithelial-myoepithelial carcinoma of external auditory canal evolving from pleomorphic adenoma.
abstract: A 45-year-old female patient visited the clinic due to ear fullness. A 8 mm sized mass was found in the external auditory canal. It was surgically removed and the pathology exam confirmed epithelial-myoepithelial carcinoma (EMC). EMC is glandular epithelial neoplasm of the salivary gland. EMC originating from the external auditory canal is very rare, and only 1 case has been reported so far in the literature. The difference between our case and the one previously published was that the tumor was previously proven as a benign tumor (i.e. pleomorphic adenoma) 5 years ago. Therefore, this is the first case in the literature showing the evolvement of pleomorphic adenoma of the external auditory canal into EMC.
authors.affiliation: Department of Otolaryngology-Head & Neck Surgery, Dankook University College of Medicine, Cheonan, Korea.
authors.forename: Jae-Wook
authors.initials: JW
authors.lastname: Lee
authors.affiliation: Department of Pathology, Dankook University College of Medicine, Cheonan, Korea.
authors.forename: Na-Hye
authors.initials: NH
authors.lastname: Myung
authors.affiliation: Department of Otolaryngology-Head & Neck Surgery, Dankook University College of Medicine, Cheonan, Korea.
authors.forename: Myung-Whan
authors.initials: MW
authors.lastname: Suh
keywords: Epithelial-myoepithelial carcinoma; External auditory canal cancer