{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T23:49:27Z","timestamp":1792108167043,"version":"4.4.0"},"reference-count":28,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,1,1]]},"abstract":"<jats:sec>\n<jats:title>OBJECTIVE<\/jats:title>\n<jats:p>Tumors around the cerebellopontine angle (CPA) and temporal bone can potentially affect hearing function. In patients with such tumors other than vestibular schwannomas (VSs), auditory tests were investigated before and after surgery to characterize the auditory effect of each tumor and to determine prognostic factors.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>METHODS<\/jats:title>\n<jats:p>A total of 378 patients were retrospectively evaluated for hearing functions before and after surgery. These 378 patients included 168 with CPA meningioma, 40 with trigeminal schwannoma (TS), 55 with facial nerve schwannoma (FNS), 64 with jugular foramen schwannoma (JFS), and 51 with CPA epidermoid cyst (EPD).<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>RESULTS<\/jats:title>\n<jats:p>Preoperative hearing loss was observed in 124 (33%) of the 378 patients. Of these 124 patients, 38 (31%) experienced postoperative hearing improvement. Postoperative hearing deterioration occurred in 67 (18%) of the 378 patients. The prognostic factors for postoperative hearing improvement were younger age and the retrocochlear type of preoperative hearing disturbance. Tumor extension into the internal auditory canal was correlated with preoperative hearing loss and postoperative hearing deterioration. Preoperative hearing loss was observed in patients with FNS (51%), JFS (42%), and MGM (37%), and postoperative hearing improvement was observed in patients with JFS (41%), MGM (31%), and FNS (21%). Postoperative hearing deterioration was observed in patients with FNS (27%), MGM (23%), and EPD (16%).<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>CONCLUSIONS<\/jats:title>\n<jats:p>According to the results of this study in patients with CPA and intratemporal tumors other than VS, preoperative retrocochlear hearing disturbance was found to be a prognostic factor for hearing improvement after surgery. Among the tumor types, JFS and MGM had a particularly favorable hearing prognosis. The translabyrinthine approach and cochlear nerve section should be avoided for these tumors, regardless of the patient\u2019s preoperative hearing level.<\/jats:p>\n<\/jats:sec>","DOI":"10.3171\/2022.3.jns212477","type":"journal-article","created":{"date-parts":[[2022,5,6]],"date-time":"2022-05-06T08:19:01Z","timestamp":1651825141000},"page":"78-85","source":"Crossref","is-referenced-by-count":8,"title":["Features of postoperative hearing function changes in patients with cerebellopontine angle and intratemporal tumors other than vestibular schwannomas"],"prefix":"10.3171","volume":"138","author":[{"given":"Norio","family":"Ichimasu","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Tokyo Medical University;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michihiro","family":"Kohno","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Tokyo Medical University;"},{"name":"Department of Neurosurgery, Tokyo Metropolitan Police Hospital; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nobuyuki","family":"Nakajima","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Tokyo Medical University;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroki","family":"Sakamoto","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Tokyo Medical University;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ken","family":"Matsushima","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Tokyo Medical University;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masanori","family":"Yoshino","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Tokyo Metropolitan Police Hospital; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kiyoaki","family":"Tsukahara","sequence":"additional","affiliation":[{"name":"Department of Otorhinolaryngology, Head and Neck Surgery, Tokyo Medical University, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"issue":"2","key":"b1","series-title":"Neurosurg Rev","doi-asserted-by":"publisher","first-page":"331","DOI":"10.1007\/s10143-014-0599-6","article-title":"Clinical features of vestibular schwannomas in patients who experience hearing improvement after surgery","volume":"38","author":"Kohno M","year":"2015","unstructured":"Kohno M, Sora S, Sato H, Shinogami M, Yoneyama H. Clinical features of vestibular schwannomas in patients who experience hearing improvement after surgery. Neurosurg Rev. 2015;38(2):331\u2013341.2552856910.1007\/s10143-014-0599-6"},{"issue":"2","key":"b2","series-title":"J Int Adv Otol","doi-asserted-by":"publisher","first-page":"170","DOI":"10.5152\/iao.2015.252","article-title":"A rare case of hearing impairment due to cerebello-pontine angle lesion: trigeminal schwannoma","volume":"11","author":"Ganesan P","year":"2015","unstructured":"Ganesan P, Sankaran P, Kothandaraman PP. A rare case of hearing impairment due to cerebello-pontine angle lesion: trigeminal schwannoma. J Int Adv Otol. 2015;11(2):170\u2013172.2638101110.5152\/iao.2015.252"},{"issue":"7","key":"b3","series-title":"Neurol Med Chir (Tokyo)","doi-asserted-by":"publisher","first-page":"352","DOI":"10.2176\/nmc.41.352","article-title":"Hearing restoration from deafness after resection of a large cerebellopontine angle meningioma\u2014case report","volume":"41","author":"Katsuta T","year":"2001","unstructured":"Katsuta T, Inoue T, Uda K, Masuda A. Hearing restoration from deafness after resection of a large cerebellopontine angle meningioma\u2014case report. Neurol Med Chir (Tokyo). 2001;41(7):352\u2013355.1148800010.2176\/nmc.41.352"},{"issue":"4","key":"b4","series-title":"J Am Acad Audiol","first-page":"251","article-title":"Hearing improvement after resection of cerebellopontine angle meningioma: case study of the preoperative role of transient evoked otoacoustic emissions","volume":"9","author":"Kileny PR","year":"1998","unstructured":"Kileny PR, Edwards BM, Disher MJ, Telian SA. Hearing improvement after resection of cerebellopontine angle meningioma: case study of the preoperative role of transient evoked otoacoustic emissions. J Am Acad Audiol. 1998;9(4):251\u2013256.9733233"},{"issue":"1","key":"b5","series-title":"Neurosurgery","doi-asserted-by":"publisher","first-page":"77","DOI":"10.1227\/01.NEU.0000154699.29796.34","article-title":"Facial and cochlear nerve function after surgery of cerebellopontine angle meningiomas","volume":"57","author":"Nakamura M","year":"2005","unstructured":"Nakamura M, Roser F, Dormiani M, Matthies C, Vorkapic P, Samii M. Facial and cochlear nerve function after surgery of cerebellopontine angle meningiomas. Neurosurgery. 2005;57(1):77\u201390.1598754310.1227\/01.NEU.0000154699.29796.34"},{"issue":"3","key":"b6","series-title":"Auris Nasus Larynx","doi-asserted-by":"publisher","first-page":"398","DOI":"10.1016\/j.anl.2010.09.005","article-title":"Severe progressive sensorineural hearing loss improved after removal of large jugular foramen schwannoma","volume":"38","author":"Oishi N","year":"2011","unstructured":"Oishi N, Kohno N, Shiokawa Y. Severe progressive sensorineural hearing loss improved after removal of large jugular foramen schwannoma. Auris Nasus Larynx. 2011;38(3):398\u2013401.2097158810.1016\/j.anl.2010.09.005"},{"issue":"5","key":"b7","series-title":"Eur Arch Otorhinolaryngol","doi-asserted-by":"publisher","first-page":"247","DOI":"10.1007\/s00405-003-0666-z","article-title":"Reversible cochleo-vestibular deficits in two cases of jugular foramen tumor after surgery","volume":"261","author":"Wang SJ","year":"2004","unstructured":"Wang SJ, Hsu WC, Young YH. Reversible cochleo-vestibular deficits in two cases of jugular foramen tumor after surgery. Eur Arch Otorhinolaryngol. 2004;261(5):247\u2013250.1368026010.1007\/s00405-003-0666-z"},{"issue":"1","key":"b8","series-title":"Surg Neurol","doi-asserted-by":"publisher","first-page":"60","DOI":"10.1016\/S0090-3019(97)00452-7","article-title":"Recovery of hearing after removal of a large jugular foramen schwannoma: report of two cases","volume":"51","author":"Yamakami I","year":"1999","unstructured":"Yamakami I, Nakamura T, Ono J, Yamaura A. Recovery of hearing after removal of a large jugular foramen schwannoma: report of two cases. Surg Neurol. 1999;51(1):60\u201365.995212510.1016\/S0090-3019(97)00452-7"},{"issue":"VideoSuppl2","key":"b9","series-title":"Neurosurg Focus","doi-asserted-by":"publisher","DOI":"10.3171\/2017.10.FocusVid.17290","article-title":"Retrosigmoid transmeatal and suprajugular approach for cerebellopontine angle meningioma: operative video","volume":"43","author":"Matsushima K","year":"2017","unstructured":"Matsushima K, Kohno M. Retrosigmoid transmeatal and suprajugular approach for cerebellopontine angle meningioma: operative video. Neurosurg Focus. 2017;43(VideoSuppl2):V3.2896730610.3171\/2017.10.FocusVid.17290"},{"key":"b10","series-title":"World Neurosurg","doi-asserted-by":"publisher","first-page":"e984","DOI":"10.1016\/j.wneu.2019.01.223","article-title":"Retrosigmoid intradural suprajugular approach to jugular foramen tumors with intraforaminal extension: surgical series of 19 cases","volume":"125","author":"Matsushima K","year":"2019","unstructured":"Matsushima K, Kohno M, Nakajima N,  Retrosigmoid intradural suprajugular approach to jugular foramen tumors with intraforaminal extension: surgical series of 19 cases. World Neurosurg. 2019;125:e984\u2013e991.10.1016\/j.wneu.2019.01.223"},{"key":"b11","series-title":"Skull Base Surgery: Strategies.","article-title":"Jugular foramen (intracranial)","author":"Matsushima K","year":"2019","unstructured":"Matsushima K, Kohno M. Jugular foramen (intracranial). In: Jean WC, ed. Skull Base Surgery: Strategies.Thieme;2019."},{"issue":"9","key":"b12","series-title":"Acta Neurochir (Wien)","doi-asserted-by":"publisher","first-page":"2465","DOI":"10.1007\/s00701-021-04840-0","article-title":"Importance of appropriate surgical approach selection for radical resection of cerebellopontine angle epidermoid cysts with preservation of cranial nerve functions: our experience of 54 cases","volume":"163","author":"Sakamoto H","year":"2021","unstructured":"Sakamoto H, Kohno M, Matsushima K, Ichimasu N, Nakajima N, Yoshino M. Importance of appropriate surgical approach selection for radical resection of cerebellopontine angle epidermoid cysts with preservation of cranial nerve functions: our experience of 54 cases. Acta Neurochir (Wien). 2021;163(9):2465\u20132474.3394219010.1007\/s00701-021-04840-0"},{"issue":"5","key":"b13","series-title":"Acta Neurochir (Wien)","doi-asserted-by":"publisher","first-page":"1059","DOI":"10.1007\/s00701-010-0937-6","article-title":"Intraoperative continuous monitoring of evoked facial nerve electromyograms in acoustic neuroma surgery","volume":"153","author":"Amano M","year":"2011","unstructured":"Amano M, Kohno M, Nagata O, Taniguchi M, Sora S, Sato H. Intraoperative continuous monitoring of evoked facial nerve electromyograms in acoustic neuroma surgery. Acta Neurochir (Wien). 2011;153(5):1059\u20131067.2134071210.1007\/s00701-010-0937-6"},{"issue":"3","key":"b14","series-title":"Otolaryngol Head Neck Surg","first-page":"186","article-title":"Committee on Hearing and Equilibrium guidelines for the evaluation of results of treatment of conductive hearing loss","volume":"113","year":"1995","unstructured":"Committee on Hearing and Equilibrium guidelines for the evaluation of results of treatment of conductive hearing loss. Otolaryngol Head Neck Surg. 1995;113(3):186\u2013187.7675477"},{"issue":"5","key":"b15","series-title":"Otolaryngol Head Neck Surg (1979).","doi-asserted-by":"publisher","first-page":"555","DOI":"10.1177\/019459988008800508","article-title":"Rare tumors of the cerebellopontine angle","volume":"88","author":"Brackmann DE","year":"1980","unstructured":"Brackmann DE, Bartels LJ. Rare tumors of the cerebellopontine angle. Otolaryngol Head Neck Surg (1979).1980;88(5):555\u2013559.696938310.1177\/019459988008800508"},{"issue":"12","key":"b16","series-title":"J Laryngol Otol","doi-asserted-by":"publisher","first-page":"1087","DOI":"10.1017\/S0022215100125393","article-title":"Unusual cerebello-pontine angle tumours","volume":"107","author":"Moffat DA","year":"1993","unstructured":"Moffat DA, Saunders JE, McElveen JT Jr, McFerran DJ, Hardy DG. Unusual cerebello-pontine angle tumours. J Laryngol Otol. 1993;107(12):1087\u20131098.828899510.1017\/S0022215100125393"},{"issue":"5","key":"b17","series-title":"J Neurol Surg B Skull Base","doi-asserted-by":"publisher","first-page":"458","DOI":"10.1055\/s-0038-1675590","article-title":"The natural history of facial schwannomas: a meta-analysis of case series","volume":"80","author":"Bartindale M","year":"2019","unstructured":"Bartindale M, Heiferman J, Joyce C, Balasubramanian N, Anderson D, Leonetti J. The natural history of facial schwannomas: a meta-analysis of case series. J Neurol Surg B Skull Base. 2019;80(5):458\u2013468.3153488610.1055\/s-0038-1675590"},{"issue":"3","key":"b18","series-title":"Otolaryngol Clin North Am","doi-asserted-by":"publisher","first-page":"491","DOI":"10.1016\/j.otc.2015.02.008","article-title":"Primary tumors of the facial nerve","volume":"48","author":"McRackan TR","year":"2015","unstructured":"McRackan TR, Wilkinson EP, Rivas A. Primary tumors of the facial nerve. Otolaryngol Clin North Am. 2015;48(3):491\u2013500.2591040510.1016\/j.otc.2015.02.008"},{"issue":"5","key":"b19","series-title":"J Neurosurg","doi-asserted-by":"publisher","first-page":"794","DOI":"10.3171\/JNS\/2008\/109\/11\/0794","article-title":"Microsurgical management of 53 jugular foramen schwannomas: lessons learned incorporated into a modified grading system","volume":"109","author":"Bulsara KR","year":"2008","unstructured":"Bulsara KR, Sameshima T, Friedman AH, Fukushima T. Microsurgical management of 53 jugular foramen schwannomas: lessons learned incorporated into a modified grading system. J Neurosurg. 2008;109(5):794\u2013803.1897606710.3171\/JNS\/2008\/109\/11\/0794"},{"issue":"6","key":"b20","series-title":"J Neurosurg","doi-asserted-by":"publisher","first-page":"924","DOI":"10.3171\/jns.1995.82.6.0924","article-title":"Surgical treatment of jugular foramen schwannomas","volume":"82","author":"Samii M","year":"1995","unstructured":"Samii M, Babu RP, Tatagiba M, Sepehrnia A. Surgical treatment of jugular foramen schwannomas. J Neurosurg. 1995;82(6):924\u2013932.776019310.3171\/jns.1995.82.6.0924"},{"issue":"4","key":"b21","series-title":"Surg Neurol","doi-asserted-by":"publisher","first-page":"205","DOI":"10.1016\/0090-3019(90)90130-H","article-title":"Jugular foramen neuromas: a review of 14 cases","volume":"34","author":"Tan LC","year":"1990","unstructured":"Tan LC, Bordi L, Symon L, Cheesman AD. Jugular foramen neuromas: a review of 14 cases. Surg Neurol. 1990;34(4):205\u2013211.239948210.1016\/0090-3019(90)90130-H"},{"issue":"5 Suppl","key":"b22","series-title":"J Neurosurg","doi-asserted-by":"publisher","first-page":"456","DOI":"10.3171\/jns.2002.97.supplement_5.0456","article-title":"Gamma knife radiosurgery for jugular foramen schwannomas","volume":"97","author":"Zhang N","year":"2002","unstructured":"Zhang N, Pan L, Dai JZ, Wang BJ, Wang EM, Cai PW. Gamma knife radiosurgery for jugular foramen schwannomas. J Neurosurg. 2002;97(5 Suppl):456\u2013458.1250707510.3171\/jns.2002.97.supplement_5.0456"},{"issue":"12","key":"b23","series-title":"Audiology and histopathology. Arch Otolaryngol","doi-asserted-by":"publisher","first-page":"679","DOI":"10.1001\/archotol.1978.00790120005001","article-title":"Cochlear nerve in neurilemomas","volume":"104","author":"Ylikoski J","year":"1978","unstructured":"Ylikoski J, Collan Y, Palva T, Jauhiainen T. Cochlear nerve in neurilemomas. Audiology and histopathology. Arch Otolaryngol. 1978;104(12):679\u2013684.71852210.1001\/archotol.1978.00790120005001"},{"key":"b24","article-title":"Microneurosurgery. Vol I. Thieme","author":"Ya\u015fargil MG","year":"1994","unstructured":"Ya\u015fargil MG. Microneurosurgery. Vol I. Thieme; 1994."},{"issue":"4 Pt 1","key":"b25","series-title":"Laryngoscope","doi-asserted-by":"publisher","first-page":"605","DOI":"10.1097\/00005537-199804000-00026","article-title":"Is the presence of transient evoked otoacoustic emmissions in ears with acoustic neuroma significant?","volume":"108","author":"Ferber-Viart C","year":"1998","unstructured":"Ferber-Viart C, Colleaux B, Laoust L, Dubreuil C, Duclaux R. Is the presence of transient evoked otoacoustic emmissions in ears with acoustic neuroma significant?. Laryngoscope. 1998;108(4 Pt 1):605\u2013609.954627810.1097\/00005537-199804000-00026"},{"issue":"3","key":"b26","series-title":"Eur Arch Otorhinolaryngol","doi-asserted-by":"publisher","first-page":"170","DOI":"10.1007\/s00405-001-0437-7","article-title":"Remarkable restoration of speech discrimination after removal of jugular foramen schwannoma: a case report","volume":"259","author":"Monobe H","year":"2002","unstructured":"Monobe H, Morita A, Murofushi T. Remarkable restoration of speech discrimination after removal of jugular foramen schwannoma: a case report. Eur Arch Otorhinolaryngol. 2002;259(3):170\u2013171.1200327210.1007\/s00405-001-0437-7"},{"issue":"11","key":"b27","series-title":"Acta Neurochir (Wien)","doi-asserted-by":"publisher","first-page":"2619","DOI":"10.1007\/s00701-020-04523-2","article-title":"Long-term prognosis of preserved useful hearing after surgery in patients with vestibular schwannoma: a study of 91 cases","volume":"162","author":"Ichimasu N","year":"2020","unstructured":"Ichimasu N, Kohno M, Nakajima N,  Long-term prognosis of preserved useful hearing after surgery in patients with vestibular schwannoma: a study of 91 cases. Acta Neurochir (Wien). 2020;162(11):2619\u20132628.3280337010.1007\/s00701-020-04523-2"},{"issue":"4","key":"b28","series-title":"Ann Otol Rhinol Laryngol","doi-asserted-by":"publisher","first-page":"797","DOI":"10.1177\/000348946907800413","article-title":"Internal auditory canal arterial relations at the porus acusticus","volume":"78","author":"Mazzoni A","year":"1969","unstructured":"Mazzoni A. Internal auditory canal arterial relations at the porus acusticus. Ann Otol Rhinol Laryngol. 1969;78(4):797\u2013814.579940410.1177\/000348946907800413"}],"container-title":["Journal of Neurosurgery"],"original-title":[],"link":[{"URL":"https:\/\/thejns.org\/view\/journals\/j-neurosurg\/138\/1\/article-p78.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/thejns.org\/downloadpdf\/journals\/j-neurosurg\/138\/1\/article-p78.xml","content-type":"text\/html","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/thejns.org\/downloadpdf\/journals\/j-neurosurg\/138\/1\/article-p78.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,11,21]],"date-time":"2024-11-21T13:14:55Z","timestamp":1732194895000},"score":1,"resource":{"primary":{"URL":"https:\/\/thejns.org\/view\/journals\/j-neurosurg\/138\/1\/article-p78.xml"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,1,1]]},"references-count":28,"journal-issue":{"issue":"1"},"URL":"https:\/\/doi.org\/10.3171\/2022.3.jns212477","relation":{},"ISSN":["0022-3085","1933-0693"],"issn-type":[{"value":"0022-3085","type":"print"},{"value":"1933-0693","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,1,1]]}}}