A Case of Pleomorphic Adenoma of the External Auditory Canal Removed by Combined Use of a Rigid Endoscope and 3D Exoscope

Pleomorphic adenoma of the external auditory canal is a rare disease. Herein, we report a case of pleomorphic adenoma of the external auditory canal that was removed through a transcanal approach by combined use of an endoscope and 3D exoscope. The patient was a 54-year-old man who presented with a history of a mass in the left ear canal. Tissue biopsy led to the suspicion of a ceruminous adenoma in the external auditory canal, and surgery was performed. Under general anesthesia, the tumor was removed through a transcanal approach, with combined use of an endoscope and a 3D exoscope. The tumor was resected with a sufficient safety margin, and the patient has not shown any evidence of recurrence for 1 year 8 months postoperatively. Surgical resection of pleomorphic adenoma of the external auditory canal with a sufficient safety margin is necessary, and combined use of an endoscope and 3D exoscope seems to be useful.