Hearing Improvement after Conservative Approach for Large C-P Angle Meningioma Kensuke Kiyomizu 1 1Department of Otorhinolaryngology,Miyazaki Medical College pp.765-769
Published Date 2004/10/20
DOI https://doi.org/10.11477/mf.1411100666
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 A 42-year-old woman with dramatic recovery of hearing after the removal of a 5.5cm C-P angle meningioma was presented. She had a six-years'history of hearing loss in her right ear,which was later accompanied by dizziness and headache. Her pure tone average(PTA)in October 1999 revealed scale out. She also had Bruns nystagmus and no caloric response with 0℃ice water in her right ear. Most of the tumor was surgically removed during two operations. One week after the second operation,her PTA was 38.8dB and her speech discrimination score(SDS)was 30%. Bruns nystagmus was disappeared but there was still no caloric response. Four months later,her PTA and SDS improved to 23.8dB and 90%respectively. Eight months later,her caloric response improved to a level of moderate CP. Hearing improvement after the removal of the tumor indicates hearing loss in this case could be caused by the cochlear nerve conduction block.

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