Vestibular schwannoma showing a dural tail on contrastenhanced magnetic resonance images

Noguchi, Yoshihiro; Komatsuzaki, Atsushi; Yamada, Ichiro; Okuno, Hideji

doi:10.1017/s0022215100138873

Cited by 7 publications

(4 citation statements)

References 8 publications

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“…The lesion corresponds to a pituitary macro-adenoma. ment can diff erentiate this tumour from a meningioma (6,10,11,35). In our study 7 tumours were located in the CPA (5 acoustic neuromas and 2 meningiomas).…”

Section: Figurementioning

confidence: 57%

Dural tail sign adjacent to different intracranial lesions on contrast-enhanced MR images

Bećirević-Ibrišević

2011

JHSCI

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Introduction: The aim of this study is to determine the prevalence of dural tail sign (DTS) in meningiomas, glioblastomas multiforme, metastasis, pituitary macro-adenomas, acoustic neuromas, medulloblastomas, lymphomas and Wegener's granulomatosis, and to reveal if DTS is specifi c for meningiomas. Methods: In this retrospective, cross sectional study 96 patients were included with 95 intracranial and 1 extracranial lesions. The study was conducted in the period from January 2008 to May 2010 and the group pattern was made consecutively. The patients underwent surgery and all 96 lesions were examined by histopathology analysis. DTS was analysed on contrast T1-weighted spin echo images after injection of 0.1 mmol/kg gadolinium contrast medium. The presence of this sign was defi ned using Goldsher et al's criteria. Results: Histopathology results of the 96 lesions revealed the presence of: 35 meningiomas, 25 glioblastomas multiforme, 13 metastasis, 10 pituitary adenomas, 5 acoustic neuromas, 4 medulloblastomas, 3 lymphomas and 1 Wegener's granulomatosis. On the contrast-enhanced T1 MR images, DTS was noted in 31 (32.3%) lesions, in the following histological samples: meningioma, GBM, adenoma, schwannoma, medulloblastoma and Wegener's granulomatosis, while in the cases of metastasis and lymphomas DTS was not noted. We found the dural tail sign to have a sensitivity of 68.6% and specifi city of 88.5% in the diagnosis of meningioma. Conclusion:The dural tail is a common but not a pathognomic sign of meningioma on contrast-enhanced T1 MR images. Other intracranial lesions, such as glioblastoma multiforme, pituitary adenoma, schwannoma, medulloblastoma and Wegener's granulomatosis may also be represented with this sign.

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Section: Figurementioning

confidence: 57%

Dural tail sign adjacent to different intracranial lesions on contrast-enhanced MR images

Bećirević-Ibrišević

2011

JHSCI

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“…However, a definitive conclusion was not drawn due to the small number of patients with radiologic-pathologic correlation. 9 A number of subsequent case reports and small series have expanded the types of intracranial neoplasms that may exhibit a dural tail, eventually including a number of benign [15][16][17][18][19][20][21][22][23][24] and malignant primary tumors, [25][26][27][28][29][30][31][32][33][34][35][36][37] metastatic lesions, [38][39][40][41][42][43][44] facial nerve schwannoma, 45 and VS. [46][47][48][49] While many of these tumors occur at other intracranial locations, a number of malignant primary CPA tumors exhibiting a dural tail have been reported, including glioblastoma, 34,37 medulloblastoma, 31 and melanoma. 30 In the case of CPA medulloblastoma, the authors commented on histopathologic evidence of dural tumor invasion.…”

Section: Discussionmentioning

confidence: 99%

“…A number of subsequent case reports and small series have expanded the types of intracranial neoplasms that may exhibit a dural tail, eventually including a number of benign 15‐24 and malignant primary tumors, 25‐37 metastatic lesions, 38‐44 facial nerve schwannoma, 45 and VS 46‐49 . While many of these tumors occur at other intracranial locations, a number of malignant primary CPA tumors exhibiting a dural tail have been reported, including glioblastoma, 34,37 medulloblastoma, 31 and melanoma 30 .…”

Section: Discussionmentioning

confidence: 99%

Prevalence and Surgical Implications of Dural Enhancement at the Porus Acusticus in Vestibular Schwannomas

Patel

Abel

Link

et al. 2016

Otolaryngol.--head neck surg.

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Dural enhancement is present in approximately 10% of extracanalicular VS. Dural enhancement at the porus acusticus may represent hypervascularity, dural reaction, or infiltration, and portends increased tumor adherence and greater likelihood of subtotal resection to preserve facial nerve function. To our knowledge, this is the first series that reports the prevalence of this phenomenon in VS and the potential surgical implications. Recognition preoperatively may be valuable toward patient counseling.

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“…Nessa região, o neurinoma [2][3][4][5][6] do acústico e o meningioma [7][8][9] são tumores por demais comuns nas casuísticas dos diversos serviços de todo o mundo. Entretanto, com menos frequência, outros tumores assentam-se no APC, dentre os quais: o lipoma 10 , o adenoma do saco endolinfático 11 , o carcinoma de células basais 12 ,o cisto aracnóideo 13 , o epidermóide, o neurinoma do facial, o papiloma do plexo coroide, a metástase de neuroblastoma, o colesteatoma, o angioleiomioma, o hemangioma venoso, o angioma cavernoso 14 , o glioma pontino 15 , o neurinoma dos nervos glossofaríngeo, vago e accessório 16 , o meduloblastoma 17 , o ependimoma 18 , o melanoma 19 e a neurilemomatose 20 .…”

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Diagnóstico de tumores do ângulo ponto-cerebelar com o auxílio de técnicas de inteligência artificial

Leitão

Gomes

Diógenes

et al. 2000

Arq. Neuro-Psiquiatr.

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RESUMO -Trata-se de estudo multidisciplinar, cujo objetivo é a obtenção de modelo discriminatório entre diagnóstico de tumores do ângulo ponto-cerebelar (APC) e de distúrbios otorrinolaringológicos. Presentemente, a realização de um acurado exame neurológico e/ou otorrinolaringológico é incapaz de firmar diagnóstico de tumor do APC, sem valer-se de exames radiológicos de alto custo (tomografia computadorizada, ressonância magnética). O modelo proposto foi obtido através da utilização de técnicas de inteligência artificial e apresentou bom nível de acurácia (88,4%) no teste de novos casos, considerando-se apenas o exame clínico e sem o auxílio de exames radiológicos.PALAVRAS-CHAVE: tumor do ângulo ponto-cerebelar, distúrbio otorrinolaringológico, inteligência artificial, aprendizagem automática, indução em árvores de decisão. A diagnostic model for cerebellum-pontine angle tumors using artificial intelligence techniquesABSTRACT-We are concerned in this paper with learning classification procedures from known cases. More precisely, we provide a diagnostic model that discriminate between cerebellum-pontine angle (CPA) tumors and otorhinolaryngological (ENT) disorders. Usually, in order to distinguish between CPA tumors and ENT disorders one must perform clinical-neurological examination together with expensive radiological imagery (CT and MRI). The proposed model was obtained through artificial intelligence methods and presented a good accuracy level (88.4%) when tested against new cases, considering only clinical examination without radiological imagery results.KEY WORDS: cerebello-pontine angle tumor, otorhinolaryngological disorder, artificial intelligence, machine learning, decision tree induction.Por ângulo pontocerebelar (APC), entende-se região da fossa posterior circundada pelas cisternas do cerebelo e pelo clivo e a face posterior do osso petroso, ventralmente 1 . Nessa região, o neurinoma 2-6 do acústico e o meningioma 7-9 são tumores por demais comuns nas casuísticas dos diversos serviços de todo o mundo. Entretanto, com menos frequência, outros tumores assentam-se no APC, dentre os quais: o lipoma 10

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Vestibular schwannoma showing a dural tail on contrastenhanced magnetic resonance images

Cited by 7 publications

References 8 publications

Dural tail sign adjacent to different intracranial lesions on contrast-enhanced MR images

Dural tail sign adjacent to different intracranial lesions on contrast-enhanced MR images

Prevalence and Surgical Implications of Dural Enhancement at the Porus Acusticus in Vestibular Schwannomas

Diagnóstico de tumores do ângulo ponto-cerebelar com o auxílio de técnicas de inteligência artificial

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