{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,7]],"date-time":"2026-08-07T17:55:34Z","timestamp":1786125334621,"version":"build-2736575974"},"reference-count":6,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"1","license":[{"start":{"date-parts":[[2019,9,12]],"date-time":"2019-09-12T00:00:00Z","timestamp":1568246400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Operative Surg.","ONSURG"],"published-print":{"date-parts":[[2020,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Vestibular schwannomas are the most common benign tumors of the pontocerebellar angle,\n                    <jats:sup>1,2<\/jats:sup>\n                    their microsurgical complexity is related to their size and neurovascular relationships. The purpose of this work is to analyze the clinical, anatomic characteristics, microsurgical treatment, and the postoperative results according to the Hannover gradual scale in 4 patients with vestibular schwannomas. The 4 patients gave their consent to the procedure and all consented to the use of their surgical videos, preoperative and postoperative studies, and postoperative pictures.\n                  <\/jats:p>\n                  <jats:p>\n                    Case 1: A 39-yr-old woman, with left ear hearing loss. Magnetic resonance imaging (MRI) showed small Intracanalicular schwannoma (T1 classification by Hannover). Microsurgery was performed and resection through a retrosigmoid approach\n                    <jats:sup>2,3<\/jats:sup>\n                    with anatomic and functional preservation of the facial and cochlear nerve.\n                  <\/jats:p>\n                  <jats:p>Case 2: A 40-yr-old woman, with left ear hypoacusia. MRI showed an extrameatal schwannoma reaching the brainstem (T3b Hannover classification). The complete re-section through retrosigmoid approach were performed.<\/jats:p>\n                  <jats:p>\n                    Case 3: A 69-yr-old woman, without hearing in the right ear. RM: Medium schwannoma (T4a classification of Hannover). Microsurgery was performed with anatomic and functional preservation of the facial nerve.\n                    <jats:sup>4-6<\/jats:sup>\n                  <\/jats:p>\n                  <jats:p>Case 4: A 32-yr-old woman, without hearing in the left ear. In addition, cerebellar syndrome and headache. RM: Large schwannoma (T4b classification of Hannover). Sur-gery was performed, anatomic preservation of the facial nerve, with moderate paresis in the postoperative period.<\/jats:p>\n                  <jats:p>\n                    Microsurgical resection with functional preservation of the facial and cochlear nerve is the main objective\n                    <jats:sup>7<\/jats:sup>\n                    when addressing this pathology.\n                  <\/jats:p>","DOI":"10.1093\/ons\/opz271","type":"journal-article","created":{"date-parts":[[2019,9,12]],"date-time":"2019-09-12T22:20:55Z","timestamp":1568326855000},"page":"E61-E62","source":"Crossref","is-referenced-by-count":0,"title":["Microsurgical Resection of Vestibular Schwannomas, Presentation of Cases in 3D: 3-Dimensional Operative Video"],"prefix":"10.1227","volume":"19","author":[{"given":"Alvaro","family":"Campero","sequence":"first","affiliation":[{"name":"Department of Neurological Surgery, Padilla Hospital, Tucum\u00e1n, Argentina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matias","family":"Baldoncini","sequence":"additional","affiliation":[{"name":"Department of Neurological Surgery, San Fernando Hospital, Buenos Aires, Argentina"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2020,7]]},"reference":[{"key":"bib1-20231101","doi-asserted-by":"crossref","first-page":"45","DOI":"10.4103\/sni.sni_129_16","article-title":"Clinical features, microsurgical treatment, and outcome of vestibular schwannoma with brainstem compression","volume":"8","author":"Harati","year":"2017","journal-title":"Surg Neurol Int"},{"key":"bib3-20231101","doi-asserted-by":"crossref","first-page":"441","DOI":"10.1016\/S1130-1473(05)70392-4","article-title":"Anatom\u00eda topogr\u00e1fica del asterion","volume":"16","author":"Mart\u00ednez","year":"2005","journal-title":"Neurocirug\u00eda"},{"key":"bib4-20231101","doi-asserted-by":"crossref","first-page":"331","DOI":"10.1016\/j.nec.2008.02.002","article-title":"Surgical approaches and complications in the removal of vestibular schwannomas","volume":"19","author":"Marc Bennett","year":"2008","journal-title":"Neurosurg Clin N Am"},{"key":"bib5-20231101","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1016\/j.nec.2008.02.010","article-title":"Selection of surgical approach to acoustic neuroma","volume":"19","author":"Jackler","year":"2008","journal-title":"Neurosurg Clin N Am"},{"issue":"ONS suppl 1","key":"bib6-20231101","first-page":"ons99","article-title":"Dural landmark to locate the internal auditory canal in large and giant vestibular schwannomas: the tubingen line","volume":"69","author":"Campero","year":"2011","journal-title":"Neurosurgery"},{"issue":"ONS suppl 1","key":"bib7-20231101","first-page":"ONS38","article-title":"Fat implant is superior to muscle implant in vestibular schwannoma surgery for the prevention of cerebrospinal fluid fistulae","volume":"63","author":"L\u00fcdemann","year":"2008","journal-title":"Neurosurgery"}],"container-title":["Operative Neurosurgery"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/academic.oup.com\/ons\/article-pdf\/19\/1\/E61\/33348186\/opz271.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/www.ovid.com\/10.1093\/ons\/opz271","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,7]],"date-time":"2026-08-07T16:53:55Z","timestamp":1786121635000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ovid.com\/10.1093\/ons\/opz271"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,9,12]]},"references-count":6,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2020]]}},"URL":"https:\/\/doi.org\/10.1093\/ons\/opz271","relation":{},"ISSN":["2332-4252","2332-4260"],"issn-type":[{"value":"2332-4252","type":"print"},{"value":"2332-4260","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,9,12]]}}}