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Case Reports in Otolaryngology
Volume 2014, Article ID 975151, 4 pages
Case Report

Primary Pleomorphic Adenoma of the External Auditory Canal: A Case Report and Review of the Literature

1Department of Otolaryngology/Head and Neck Surgery, School of Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke 329-0498, Japan
2Department of Otolaryngology, Shin-Oyama City Hospital, 1-1-5 Wakagi-cho, Oyama 323-0028, Japan
3Department of Pathology, School of Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke 329-0498, Japan

Received 29 January 2014; Accepted 9 March 2014; Published 7 April 2014

Academic Editor: Renzo Mora

Copyright © 2014 Chizu Saito et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Background. Pleomorphic adenoma (PA) is a benign tumour that mainly arises from salivary glands, and PA of the external auditory canal (EAC) is very rare. The objective of this study was to clarify the clinical presentation and treatment of PA of the EAC. Method. The authors present a case of PA arising from the EAC together with a literature review. Results. A 40-year-old man complained of hearing loss and foreign-body sensation of the right ear. Clinical and radiological examinations revealed a well-defined tumour limited to the EAC, with no connection to the parotid gland. Preoperative fine-needle aspiration cytology findings were characteristic of PA. The tumour was removed en bloc with the overlying skin. Conclusion. PA of the EAC is very rare, and methods to rule out malignancy before treatment are lacking. Thus, long-term follow-up is necessary, because malignant tumours are common in the EAC and PA has malignant potential.