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Inicio Actas Urológicas Españolas (English Edition) Vesical Imaging-Reporting and Data System (VI-RADS®): Initial experience in the...
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Vol. 45. Issue 4.
Pages 320-325 (May 2021)
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Vol. 45. Issue 4.
Pages 320-325 (May 2021)
Original article
Vesical Imaging-Reporting and Data System (VI-RADS®): Initial experience in the classification of muscle-invasive bladder cancer
Vesical Imaging-Reporting and Data System (VI-RADS®): experiencia inicial en la clasificación del cáncer de vejiga músculo-infiltrante
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J. Etxanoa,
Corresponding author
etxanojon@gmail.com

Corresponding author.
, B. Rodríguez-Vigila, F. Péreza, P. Beardob, A. Viguric, E. Tolosab, B. Martínez de Guereñua
a Osakidetza, OSATEK, Unidad de Vitoria, Vitoria, Álava, Spain
b Departamento de Urología, Hospital Universitario Araba, Vitoria, Álava, Spain
c Departamento de Anatomía Patológica, Hospital Universitario Araba, Vitoria, Álava, Spain
Article information
Abstract
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Figures (2)
Tables (4)
Table 1. Summary of the MRI acquisition protocol used in our study.
Table 2. Patient distribution according to VI-RADS® and TUR result.
Table 3. Diagnostic accuracy values.
Table 4. Values of concordance between the 2 Radiologists.
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Abstract
Objective

To analyze the diagnostic accuracy of the VI-RADS® system in the differentiation of non-muscle-invasive bladder tumors (NMIBT) from muscle-invasive bladder tumors (MIBT) in suspicious cystoscopic findings without prior transurethral resection (TUR) evaluated by radiologists with no prior experience in its use.

Material and methods

Retrospective study carried out with 18 patients with suspicious lesions in cystoscopy. All of them underwent MRI of the bladder. Two radiologists with no prior experience in the use of the VI-RADS® system evaluated the results. All patients underwent TUR of the suspicious lesions after MRI. The sensitivity and specificity of the system were analyzed for VI-RADS® values ​​≥3 or VI-RADS® ≥4, as well as the Cohen’s kappa coefficient between both radiologists.

Results

The mean values ​​of sensitivity and specificity of both radiologists considering both the VI-RADS® ≥3 or VI-RADS® ≥4 values were 91.7% and 87.5%, respectively. The kappa coefficient considering the VI-RADS® ≥3 as positive, was 0.551 (P < .05), while considering the VI-RADS® ≥4 as positive, it was 0.571 (P < .05).

Conclusion

The VI-RADS® system presents excellent sensitivity ​​ (91.7%) and specificity (87.5%) values in the classification of MIBT performed by radiologists with no prior experience in its use, with a moderate interobserver agreement.

Keywords:
Urothelial bladder tumors
Magnetic resonance imaging
VI-RADS®
Resumen
Objetivo

Analizar la precisión diagnóstica del sistema VI-RADS® en radiólogos sin experiencia previa en su uso para diferenciar tumores de vejiga no músculo-infiltrantes (TVNMI) de tumores de vejiga músculo-infiltrantes (TVMI) en lesiones sospechosas de malignidad en cistoscopia sin resección transuretral previa (RTU).

Material y métodos

Estudio retrospectivo en el que se incluyeron 18 pacientes con lesiones sospechosas en cistoscopia a los que se les realizó una RM de vejiga. Dos radiólogos sin experiencia previa en el sistema VI-RADS® evaluaron los estudios. Tras la RM, a los pacientes se les realizo una RTU de las lesiones sospechosas. Se analizó la sensibilidad y especificidad del sistema para valores VI-RADS® ≥3 o VI-RADS® ≥4, así como el índice kappa de cohen entre ambos radiólogos.

Resultados

Los valores medios de sensibilidad y especificidad de ambos radiólogos considerando tanto a los estudios VI-RADS® ≥3 o VI-RADS® ≥4 fueron 91,7% y 87,5% respectivamente. El índice kappa considerando los estudios VI-RADS® ≥3 positivos fue de 0,551 (P < ,05) y considerando positivos los estudios VI-RADS® ≥4 de 0,571 (P < ,05).

Conclusión

El sistema VI-RADS® presenta unos excelentes valores de sensibilidad (91,7%) y especificidad (87,5%) en la clasificación de los TVMI cuando lo utilizan radiólogos sin experiencia previa en su uso con una moderada concordancia interobservador.

Palabras clave:
Tumores uroteliales de vejiga
Resonancia magnética
VI-RADS®

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