Effect of vestibular Schwannoma on contralateral hearing ability

Introduction The intracranial tumor vestibular-schwannoma (VS) is a benign tumor commonly arising from the schwannoma cells from the VIII`s cranial nerve. In 94% of the cases, it tends to be associated with sensory-neural hearing loss (SNHL), mostly on the ipsilateral site. Recent multiple studies have suggested that the outcome of the SNHL is rather associated with tumor derived secretions than with the tumor-size. Interestingly, few studies have also observed an impact of single, one-sided VS on the hearing ability of the contralateral side, which might indicate that the tumor-derived secretions operate not solely on the ipsilateral ear. We aimed to compare the contralateral hearing ability in pre-surgical as well as post-surgical VS`s cases and determine whether it shows an improvement after treatment.