Resection of small acoustic neuroma using the transcanal transvestibular\nendoscopic approach
The first patient, a woman in her 50s, presented with a 1-month history of tinnitus and\nhearing loss. She was unable to hear loud sounds in her right ear. She had no headache,\ndizziness, or facial paralysis. The patient showed no significant improvement in the hearing\nloss or tinnitus after taking an oral glucocorticoid for 1 week. Twenty days after drug\nwithdrawal, the patient visited our hospital again. A physical examination revealed complete\neardrums and no effusion in the tympanum. Pure-tone audiometry indicated a threshold of\n70 dB in the right ear. Preoperative gadolinium-enhanced MRI showed a small (11- × 6-mm)\nright-sided tumor ().