비인두암 환자에서 방사선 치료 후 발생한 외이도 편평상피암종 1례

A case of squamous cell carcinoma arising from the external auditory canal after radiation in patient with nasopharyngeal carcinoma

Squamous cell carcinoma of the external auditory canal is a rare tumor and they can easily invade adjacent organs at an early stage. And the etiology is uncertain. Radiation treatment of nasopharyngeal carcinoma may induce malignancy in the external ear. Because squamous cell carcinoma of the temporal bone and external auditory canal is so rare, developing an adequate tumor staging and treatment has been difficult. We present a case of squamous cell carcinoma of the external auditory canal in 58-year-old female who presented with a 7-year history of bilateral otorrhea after radiation treatment to nasopharyngeal carcinoma 12 years ago.