Cerebellopontine angle masses: radiologic-pathologic correlation.

Smirniotopoulos, James G.; Yue, Nancy Chang; Rushing, E J

doi:10.1148/radiographics.13.5.8210595

Cited by 64 publications

(31 citation statements)

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“…[21] Arachnoid cysts show attenuation and signal intensity parallel to those of cerebrospinal fluid, and sharp margins without calcification or contrast enhancement and without the evidence of restriction on diffusion weighted images as reported in studies by Higashi et al 1992. [22] As reported by Smirniotopoulos et al 1993, [23], vertebrobasilar dolichoectasia have prominent flow voids on magnetic resonance images with similar finding in our study.…”

Section: Discussionsupporting

confidence: 92%

Cerebellopontine Angle Lesions - Ct and MR Imaging Evaluation

Sonowal¹,

Agarwal²,

Choudhury³

et al. 2016

jemds

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BACKGROUNDCPA lesions are clinically nonspecific and the presenting symptoms are not related to the nature of the lesion itself, but to the nerves or cerebral structure involved with the lesions. Therefore, preoperative diagnosis of a CPA region tumoural lesion is based on imaging.Aim of the study was to determine various CT and MR imaging features of different CPA lesions and provide accurate possible preoperative diagnosis. To propose a concise algorithm to facilitate diagnosis and to correlate histopathologically post-operatively.

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Section: Discussionsupporting

confidence: 92%

Cerebellopontine Angle Lesions - Ct and MR Imaging Evaluation

Sonowal¹,

Agarwal²,

Choudhury³

et al. 2016

jemds

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“…VCS mainly arises near the internal acoustic pore in the region of Scarpa's ganglion at the glialSchwann junction. Occasionally it can occur at the fundus of the CAI 9 .…”

Section: Resultsmentioning

confidence: 99%

Sudden Sensorineural Hearing Loss: MR Imaging

et al. 2010

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Hearing loss greater than 30 dB over three contiguous pure-tone frequencies occurring within a three day period is defined as sudden hearing loss. It is usually sensorineural (SSNHL), unilateral and appears as an otologic emergency. SSNHL has many possibile etiologies such as: labyrinthine viral infection, ischemic or hemorrhagic illness, trauma, immuno-mediated inner ear disease, tumor, inner ear malformation, and an imbalance between perilymphatic and endolymphatic fluid pressure. Nevertheless in almost 80% of cases SSNHL belongs to the idiopathic category because the etiology is unknown. The aim of this study was to test the diagnostic impact of two MR devices. Fifteen cases of SSNHL studied with a 1.5 T unit in our hospital between January 2006 and December 2008 within two weeks of the onset were retrospectively evaluated. Since January 2009 three more patients affected by SSNHL have been scanned with a 3T MR unit. We discuss the diagnostic sensitivity, clinical usefulness and the cost-benefit ratio of the MR systems.

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“…Epidermoid cysts are relatively rare intracranial extraaxial neoplasms that are derived from the adhesions or inclusions of surface ectoderm into the developing brain (11). Epidermoid cysts have concentric lamellated internal architecture due to continuous accretion of keratin debris produced by the epithelium (12).…”

Section: Discussionmentioning

confidence: 99%

Diffusion tensor and tensor metrics imaging in intracranial epidermoid cysts

Kannath

Radhakrishnan

Saini

et al. 2009

Magnetic Resonance Imaging

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Purpose:To explore the utility of diffusion tensor imaging (DTI) and diffusion tensor metrics (DTM) in characterizing the structural pathology of epidermoid cysts. DTI gives information about the tissue structure; a high fractional anisotropy (FA) indicates a highly structured orientation of the tissue, fibers, or white matter tracts. Based on the tensor rank, a set of three metrics has been described that can be used to measure the directional dependence of diffusion: linear anisotropy (CL), planar anisotropy (CP), and spherical anisotropy (CS). DTM takes into account the shape of diffusion anisotropy and hence may provide better insight into the orientation of structures than FA.Materials and Methods: DTI was performed in three patients with epidermoid cysts. FA, directionally-averaged mean diffusivity (Dav), exponential apparent diffusion coefficient (eADC), and DTM, such as CL, CP, and CS, were measured from the tumor core as well as from the normalappearing white matter. Histopathological correlation was obtained. Results:Epidermoid cysts showed high FA with Dav values similar to that of normal white matter. eADC maps did not show any restriction of diffusion. FA values were high, but not as high as that for the white matter. CP values were higher and CL values were lower than those obtained for the white matter in various regions. Conclusion:High CP values suggest preferential diffusion of water molecules along a two-dimensional geometry, which could be attributed to the well-structured orientation of keratin filaments and flakes within the tumor as demonstrated by histopathology. Advanced imaging modalities like DTI with DTM can provide information regarding the microstructural anatomy of the epidermoid cysts.

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Cerebellopontine angle masses: radiologic-pathologic correlation.

Cited by 64 publications

References 0 publications

Cerebellopontine Angle Lesions - Ct and MR Imaging Evaluation

Cerebellopontine Angle Lesions - Ct and MR Imaging Evaluation

Sudden Sensorineural Hearing Loss: MR Imaging

Diffusion tensor and tensor metrics imaging in intracranial epidermoid cysts

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