{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,26]],"date-time":"2026-02-26T12:40:05Z","timestamp":1772109605301,"version":"3.50.1"},"reference-count":9,"publisher":"FapUNIFESP (SciELO)","issue":"3a","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Arq. Neuro-Psiquiatr."],"published-print":{"date-parts":[[2007,9]]},"abstract":"<jats:p>OBJECTIVE: To present the magnetic resonance (MR) imaging findings of 78 patients with meningiomas diagnosed in a single institution. METHOD: 78 patients with histological proven intracranial meningioma were studied. There were 52 female and 26 male patients (median=56 years). All MR imaging examinations were performed with 1.5-T MR imaging unit with standard protocol. The images were studied by two neuroradiologists, who reached the decisions regarding the findings by consensus. RESULTS: Most of the tumors showed low signal on T1- (60%) and high signl on T2- (68%) and FLAIR (69%) weighted images. Also, the lesions showed heterogeneous signal on T1 (60%), T2 (68%) and FLAIR (64%) sequences. After contrast administration, 83% (n=65) of the tumors presented acentuated and 17% (n=13) showed moderate enhancement. The tumors were located in the frontal lobe in 44% of the cases, in the parietal lobe in 35%, the occipital lobe in 19% and the temporal lobe in 12% of the patients. Areas of vasogenic edema around the tumors were seen in 90% of the cases. Twenty six per cent of the cases showed bone infiltration, and the dural tail sign was seen in 59% of the tumors. CONCLUSION: Intracranial meningiomas usually show heterogeneous low signal on T1- and high signal on T2-weighted and FLAIR images, with intense enhancement after contrast administration. The frontal and parietal lobes are commonly affected. In addition, brain edema, dural tail sign and bone infiltration are the most frequent associated findings.<\/jats:p>","DOI":"10.1590\/s0004-282x2007000400012","type":"journal-article","created":{"date-parts":[[2007,9,27]],"date-time":"2007-09-27T23:05:23Z","timestamp":1190934323000},"page":"610-614","source":"Crossref","is-referenced-by-count":15,"title":["Intracranial meningiomas: magnetic resonance imaging findings in 78 cases"],"prefix":"10.1590","volume":"65","author":[{"given":"Emerson L.","family":"Gasparetto","sequence":"first","affiliation":[{"name":"University of S\u00e3o Paulo"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Claudia da Costa","family":"Leite","sequence":"additional","affiliation":[{"name":"University of S\u00e3o Paulo"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Leandro T.","family":"Lucato","sequence":"additional","affiliation":[{"name":"University of S\u00e3o 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Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"530","reference":[{"key":"ref1","series-title":"Magnetic resonance imaging of the brain and spine","author":"Atlas SW","year":"2002"},{"key":"ref2","doi-asserted-by":"crossref","first-page":"1088","DOI":"10.1227\/01.NEU.0000188281.91351.B9","article-title":"Epidemiology of intracranial meningioma","volume":"57","author":"Claus EB","year":"2005","journal-title":"Neurosurgery","ISSN":"https:\/\/id.crossref.org\/issn\/0148-396X","issn-type":"print"},{"key":"ref3","doi-asserted-by":"crossref","first-page":"89","DOI":"10.1016\/S0090-3019(01)00349-4","article-title":"Progress in the diagnosis and treatment of patients with meningiomas: Part I: diagnostic imaging, preoperative embolization","volume":"55","author":"Engelhard HH","year":"2001","journal-title":"Surg 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on MRI and review of the literature","volume":"26","author":"Nakano T","year":"2002","journal-title":"Clin Imaging","ISSN":"https:\/\/id.crossref.org\/issn\/0899-7071","issn-type":"print"},{"key":"ref8","first-page":"1554","article-title":"Dynamic contrast-enhanced perfusion MR imaging measurements of endothelial permeability: differentiation between atypical and typical meningiomas","volume":"24","author":"Yang S","year":"2003","journal-title":"Am J Neuroradiol"},{"key":"ref9","doi-asserted-by":"crossref","first-page":"584","DOI":"10.1016\/S0090-3019(97)00016-5","article-title":"Pathologic significance of meningeal enhancement (\"flare sign\") of meningiomas on MRI","volume":"48","author":"Nakau H","year":"1997","journal-title":"Surg Neurol","ISSN":"https:\/\/id.crossref.org\/issn\/0090-3019","issn-type":"print"}],"container-title":["Arquivos de 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