{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,19]],"date-time":"2026-09-19T02:43:15Z","timestamp":1789785795303,"version":"4.0.1"},"reference-count":25,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2003,6]]},"abstract":"<jats:p content-type=\"fine-print\"><jats:italic>Object.<\/jats:italic> The clinical and neuroimaging characteristics of hydrocephalus associated with vestibular schwannoma were retrospectively analyzed to improve the perioperative management of the circulation of cerebrospinal fluid.<\/jats:p>\n<jats:p content-type=\"fine-print\"><jats:italic>Methods.<\/jats:italic> A retrospective analysis was performed in 236 patients with unilateral vestibular schwannomas. The patients' ages ranged from 17 to 83 years (mean 53.6 \u00b1 13.2 years), and the diameters of the tumors the patients harbored ranged from 5 to 60 mm (mean 30.5 \u00b1 12.7 mm). Hydrocephalus was present before tumor resection in 33 patients (14%) and in six of these patients focal dilation of the sylvian fissures was noted. There was a significant correlation between the incidence of hydrocephalus and tumor size. The incidence of preoperative hydrocephalus among elderly patients (\u2265 65 years of age) was 28.6% and that among younger patients (&lt; 65 years of age) was 10.8%. Tumors in elderly patients with hydrocephalus (mean tumor diameter 32.8 \u00b111.7 mm; 12 patients) were significantly smaller than those in younger patients (mean tumor diameter 41.7 \u00b1 10.9 mm; 21 patients). Among patients with tumors smaller than 30 mm (114 patients), the incidence of hydrocephalus in elderly patients (25%) was 12-fold higher than that in younger patients (2.1%). Six patients with hydrocephalus who had focal dilation of the sylvian fissures were significantly older than 27 patients with hydrocephalus in whom there was no focal dilation. The dilated sylvian fissures collapsed in two patients spontaneously after tumor resection and in the other four patients after shunt placement.<\/jats:p>\n<jats:p content-type=\"fine-print\"><jats:italic>Conclusions.<\/jats:italic> The incidence of associated hydrocephalus is higher in older patients. Communicating hydrocephalus tends to occur in elderly patients. Enlargement of the ventricles with focal dilation of the sylvian fissures should not be misinterpreted as physiological brain atrophy.<\/jats:p>","DOI":"10.3171\/jns.2003.98.6.1188","type":"journal-article","created":{"date-parts":[[2009,5,13]],"date-time":"2009-05-13T17:54:07Z","timestamp":1242237247000},"page":"1188-1193","source":"Crossref","is-referenced-by-count":35,"title":["Clinical and neuroimaging characteristics of hydrocephalus associated with vestibular schwannoma"],"prefix":"10.3171","volume":"98","author":[{"given":"Yuichiro","family":"Tanaka","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shigeaki","family":"Kobayashi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kazuhiro","family":"Hongo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tsuyoshi","family":"Tada","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Atsushi","family":"Sato","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroshi","family":"Takasuna","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"key":"b1","series-title":"Laryngoscope","doi-asserted-by":"publisher","first-page":"204","DOI":"10.1097\/00005537-199602000-00018","article-title":"Evolution of the management of hydrocephalus associated with acoustic neuroma.","volume":"106","author":"Atlas","year":"1996"},{"key":"b2","series-title":"J Neurosurg","doi-asserted-by":"publisher","first-page":"217","DOI":"10.3171\/jns.2001.94.2.0217","article-title":"Cerebrsopinal fluid leak after acoustic neuroma surgery: influence of tumor size and surgical approach on incidence and response to treatment.","volume":"94","author":"Brennan","year":"2001"},{"key":"b3","series-title":"J Clin Neurosci","doi-asserted-by":"publisher","first-page":"521","DOI":"10.1054\/jocn.2000.0728","article-title":"Current management of acoustic neuromas: review of surgical approaches and outcomes.","volume":"7","author":"Briggs","year":"2000"},{"key":"b4","series-title":"Otolaryngol Head Neck Surg","doi-asserted-by":"publisher","first-page":"1020","DOI":"10.1177\/019459989310900608","article-title":"Management of hydrocephalus resulting from acoustic neuromas.","volume":"109","author":"Briggs","year":"1993"},{"key":"b5","series-title":"J Neurosurg","doi-asserted-by":"publisher","first-page":"901","DOI":"10.3171\/jns.1992.76.6.0901","article-title":"Current results of the retrosigmoid approach to acoustic neurinoma.","volume":"76","author":"Ebersold","year":"1992"},{"key":"b6","series-title":"AJNR","first-page":"1327","article-title":"Age-related total gray matter and white matter changes in normal adult brain. 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