Keywords
Especificidad
Precisión
Schwanoma vestibular
Resonancia magnética Sensitivity
Specificity
Accuracy
Vestibular schwannoma
Magnetic resonance imaging
How to Cite
Abstract
Objective: to determine the test accuracy of no-contrasted magnetic resonance imaging with FIESTA sequence (FIESTA-MRI), comparing with gadolinium-contrasted MRI including FIESTA sequence (Gd-MRI), in the diagnosis of vestibular schwannoma (VS). Design: diagnostic accuracy study, phase-IIc. Methods: we estimated the FIESTA-MRI performance in the diagnosis of VS, using the Gd-MRI as gold standard. The test accuracy indicators were assessed in adult patients with suspected VS at tertiary referral center, from january 2006 to december 2011. The MRIs were acquired with a standardized protocol and evaluated blindly and independently by two neuroradiologists, using a random codes assignment of each unit of observation. The reproducibility assessment was calculated with the Kappa-Cohen inter-rater agreement coefficient. Results: we included 85 patients, 26 of them had VS and 59 had not. The sensitivity of FIESTA-MRI was=84.6% [IC 95% = 68.8%-100%], specificity=100% [IC 95% = 99.1%-100%], negative predictive value=93.6% [IC 95% = 86.8%-100%] and positive predictive value=100% [IC 95% = 97.7%-100%]. The inter-rater agreement coefficient was=0.91 [IC 95% = 0.81-1.00], Kappa Cohen, p.
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