{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,7,11]],"date-time":"2024-07-11T22:35:34Z","timestamp":1720737334768},"reference-count":0,"publisher":"Georg Thieme Verlag KG","issue":"S 03","license":[{"start":{"date-parts":[[2019,3,7]],"date-time":"2019-03-07T00:00:00Z","timestamp":1551916800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Neurol Surg B"],"published-print":{"date-parts":[[2019,6]]},"abstract":"<jats:p>\n            Introduction\u2003Vestibular schwannomas are the most common lesions occupying the internal auditory canal (IAC); however, almost in 4 to 5% of meningiomas, metastases, cysts, lipomas, and cavernous malformations have been found in this location, mimicking schwannomas. Even though cerebellopontine angle (CPA) meningiomas with the involvement of the IAC are frequently encountered, the presence of a primary intracanalicular meningioma is rare.<\/jats:p><jats:p>\n            Objective\u2003To show the technical nuances of the retrosigmoid-transmeatal approach to successfully achieve gross total resection (GTR) with preservation of facial and auditory function.<\/jats:p><jats:p>\n            Case Report\u2003We present a left intracanalicular meningioma on a 60-year-old man with history of tinnitus and hearing loss. Magnetic resonance imaging (MRI) showed a left intracanalicular lesion completely obliterating the IAC and with minor extension to the CPA cistern, with the vestibulocochlear complex dislocated posteriorly, initially diagnosed as a Hannover's T2 vestibular schwannoma. The patient underwent a left retrosigmoid approach, and during the exposure of the lesion, the diagnosis of a meningioma became evident. The transmeatal phase of the approach was modified with a wide opening of the canal, including the anterior wall. Closure was performed using a muscle graft, duramater flap, and fibrin glue.<\/jats:p><jats:p>\n            Results\u2003GTR was achieved and the patient developed a mild facial palsy (House\u2013Brackmann grade III) which completely recovered within 3 months.<\/jats:p><jats:p>\n            Conclusions\u2003The retrosigmoid transmeatal approach is suitable to achieve GTR in intracanalicular meningiomas. Some modifications of the approach intended for vestibular schwannomas are necessary and may be performed during the procedure.<\/jats:p><jats:p>The link to the video can be found at: https:\/\/youtu.be\/A9OXRFIl1e8.<\/jats:p>","DOI":"10.1055\/s-0039-1677858","type":"journal-article","created":{"date-parts":[[2019,3,8]],"date-time":"2019-03-08T01:40:31Z","timestamp":1552009231000},"page":"S311-S311","source":"Crossref","is-referenced-by-count":1,"special_numbering":"S","title":["Retrosigmoid Transmeatal Approach with 360-Degree Drilling of the Internal Auditory Canal for the Resection of Intracanalicular Meningioma"],"prefix":"10.1055","volume":"80","author":[{"given":"Ricardo","family":"Ramina","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Neurological Institute of Curitiba, Curitiba, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Felipe","family":"Constanzo","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Neurological Institute of Curitiba, Curitiba, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"suffix":"Jr","given":"Erasmo Barros","family":"da Silva","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Neurological Institute of Curitiba, Curitiba, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maur\u00edcio","family":"Coelho Neto","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Neurological Institute of Curitiba, Curitiba, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"194","published-online":{"date-parts":[[2019,3,7]]},"container-title":["Journal of Neurological Surgery Part B: Skull Base"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/www.thieme-connect.de\/products\/ejournals\/pdf\/10.1055\/s-0039-1677858.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,5,24]],"date-time":"2019-05-24T18:44:34Z","timestamp":1558723474000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.thieme-connect.de\/DOI\/DOI?10.1055\/s-0039-1677858"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,3,7]]},"references-count":0,"journal-issue":{"issue":"S 03","published-online":{"date-parts":[[2019,5,24]]},"published-print":{"date-parts":[[2019,6]]}},"URL":"https:\/\/doi.org\/10.1055\/s-0039-1677858","relation":{},"ISSN":["2193-6331","2193-634X"],"issn-type":[{"value":"2193-6331","type":"print"},{"value":"2193-634X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,3,7]]}}}