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ArticleTitle	A Case of Squamous-cell Carcinoma Originating in External Auditory Canal Cholesteatoma
AuthorList	Hideharu Aoki1 and Kouji Matsumoto2
Affiliation	1Department of Otorhinolaryngology, Nippon Medical School Second Hospital 2Department of Pathology, Nippon Medical School Second Hospital
Language	JA
Volume	70
Issue	4
Year	2003
Page	363-366
Received	December 12, 2002
Accepted	December 20, 2002
Keywords	External auditory canal cholesteatoma, squamous-cell carcinoma of the external auditory canal, surgical treatment, radiotherapy
Abstract	External auditory canal cholesteatoma (EACC) is not a rare lesion. Conservative treatment under an operating microscope is appropriate for most cases. On the other hand, squamous-cell carcinoma of middle ear and external auditory canal is less common. We report a case of a 66-year-old man. He suffered from squamous-cell carcinoma following EACC. A biopsy from the external auditory canal was not useful for diagnosis. A biopsy during the first operation revealed squamous-cell carcinoma. The patient was treated by extended radical mastoidectomy and radiotherapy continuously. There is no evidence of recurrence after 14 months.
Correspondence to	Hideharu Aoki, Department of Otorhinolaryngology, Nippon Medical School Second Hospital, 1-396 Kosugi-cho, Kawasaki-shi, Kanagawa 211-8533, Japan