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Epithelial-myoepithelial carcinoma of external auditory canal evolving from pleomorphic adenoma
Jae-Wook Lee1, Na-Hye Myung2, Myung-Whan Suh1
1Department of Otolaryngology-Head & Neck Surgery, Dankook University College of Medicine, Cheonan, Korea.
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.
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