SPONTANEOUS SHRINKAGE OF VESTIBULAR SCHWANNOMA. CASE REPORT AND REVIEW OF THE LITERATURE
Abstract
Vestibular schwannoma (VS), commonly known as acoustic neuroma, is a slow-growing, benign tumor that originates from the transition zone between the central and peripheral myelin of the vestibular branches of cranial nerve VIII. After making the diagnosis, a conservative approach is an option depending on the tumor size and involves the “watch, wait and rescan” (WWR) policy. We present a rare case of a 59 years old woman, who presented with bilateral hearing loss. Routine imaging showed both otosclerosis and a vestibular schwannoma. She was followed-up with annual MRI between 2006 and 2019 showing a complete shrinkage of the vestibular tumor. Studies describe the natural history of a vestibular schwannoma to be slow growing or in small cases spontaneous shrinkage. However, there are still no pathological theories for the tumor regression process. An internationally method of strategies based on size, radiological aspect and symptoms is needed for a standardized care by analyzing a larger series of patients.
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