Various Tumors in the 4th Ventricle in Adults: MRI Findings

Kim, Seung Ja; Chang, Kee Hyun; Kim, Keon Ha; Choi, Ja Young; Kwon, Bae Joo; Han, Moon Hee

doi:10.3348/jkrs.2003.49.3.155

Cited by 2 publications

(2 citation statements)

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“…These include lesions in the ventricle or adjacent to the ventricle 10 and lesions in the midline posterior fossa. 11 Diffusion-weighted imaging (DWI) is based on the irregular diffusion motion of water molecules and provides more detailed information at the cellular level than conventional magnetic resonance imaging (MRI).…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have focused on the entire posterior fossa 1,4,5 or the cerebellum 6 -9 and have found that tumours are common in the fourth ventricle region. These include lesions in the ventricle or adjacent to the ventricle 10 and lesions in the midline posterior fossa. 11 Diffusion-weighted imaging (DWI) is based on the irregular diffusion motion of water molecules and provides more detailed information at the cellular level than conventional magnetic resonance imaging (MRI).…”

Section: Introductionmentioning

confidence: 99%

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Value of Diffusion-Weighted Imaging in Grading Tumours Localized in the Fourth Ventricle Region by Visual and Quantitative Assessments

Geng

Huang

et al. 2011

J Int Med Res

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This study investigated visual and quantitative assessment of diffusion-weighted imaging (DWI) for grading tumours localized in the fourth ventricle region. Patients were diagnosed histopathologically and classified into two groups: those with high-grade (World Health Organization [WHO] grades III and IV) and those with low-grade tumours (benign, WHO grades I and II). DWI signal intensity was described using a five-point scale. Minimum apparent diffusion coefficient (ADC) values were obtained from areas with the lowest signal. The mean signal intensity was significantly higher in high-grade than in low-grade tumours. The mean minimum ADC value was significantly lower in high-grade than low-grade tumours. Marked hyperintensity had sensitivity, specificity, positive predictive value and negative predictive value of 89.7%, 100%, 100% and 94.2%, respectively, when used as a diagnostic tool for high-grade tumours compared with 96.6%, 97.9%, 96.6% and 97.9%, respectively, when using a minimum ADC of 0.9 × 10(-3) mm(2)/s as a diagnostic marker. It was concluded that DWI is helpful in predicting the grades of tumours in the fourth ventricle region.

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Section: Introductionmentioning

confidence: 99%