LU-TING KUOABEL PO-HAO HUANGKUAN-TING KUOTseng H.-M.2020-03-272020-03-2720080090-3019https://www.scopus.com/inward/record.uri?eid=2-s2.0-56949083252&doi=10.1016%2fj.surneu.2007.11.023&partnerID=40&md5=646547dfd103748ece75ef215ff6b896https://scholars.lib.ntu.edu.tw/handle/123456789/479640Background: Dumbbell-shaped schwannomas of the hypoglossal nerve are very rare. This report concerns a case with an extradural, dumbbell-shaped hypoglossal schwannoma extending both intra- and extracranially. Case Description: A 25-year-old woman presented with a right hypoglossal palsy. Imaging revealed a dumbbell-shaped tumor with considerable compression and medial displacement of the medulla oblongata, diagnosed as a hypoglossal schwannoma. The tumor mass extended extracranially to the parapharyngeal space through the enlarged hypoglossal canal. The tumor was partially excised by a right far-lateral suboccipital approach and the tumor was found to be predominantly extradural with minimal intradural extension. A histopathologic diagnosis of schwannoma was made. Conclusions: This case emphasizes the importance of recognizing this extradural variant of schwannoma. Staged extracranial and intracranial approaches to these tumors may be necessary. ? 2008 Elsevier Inc. All rights reserved.[SDGs]SDG3adult; article; cancer surgery; case report; cranial nerve paralysis; female; follow up; histopathology; human; human tissue; hypoglossal nerve disease; hypoglossal neurilemoma; medulla oblongata; neurilemoma; spinal cord tumor; surgical approach; tumor localizationjournal article10.1016/j.surneu.2007.11.023184235392-s2.0-56949083252