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POSTERSConclusion: Automastoidectomy is a relatively rare condition of middle ear diseases. It could be caused by cholesteatomatous COM and non-cholesteatomatous COM. Hearing reconstructive procedures are generally not effective compared with other conditions. This study may be helpful to know the clinical features and surgical outcomes of this condition. Otology/NeurotologyClinical Value of VEMP in Ménière's Disease Hye-Youn Youm, MD (presenter); Min Beom Kim; Jeesun Choi; Ha-Young Byun; Ga-Young Park; Won-Ho Chung Objective: 1) To find clinical value of cervical vestibular evoked myogenic potential (VEMP) in Ménière's disease (MD). 2) To evaluate whether the VEMP results can be useful in assessing the stage of MD. 3) To evaluate the clinical effectiveness of VEMP in predicting hearing outcome.