Department of Anesthesiology Beijing Tiantan Hospital Capital Medical University Beijing 100070 China;
Department of Anesthesiology Beijing Tiantan Hospital Capital Medical University Beijing 100070 China;
Department of Anesthesiology Beijing Tiantan Hospital Capital Medical University Beijing 100070 China;
Department of Anesthesiology Beijing Tiantan Hospital Capital Medical University Beijing 100070 China;
Awake craniotomy; Neurofibromatosis type 2; Auditory brainstem implant; Hearing test; Case report;