To assess the accuracy of the VI-RADS scoring system and the complementary value of quantitative parameters of tumors to the VI-RADS scoring system.

A retrospective analysis was performed on 79 cases of pathologically confirmed bladder cancer in Taizhou People's Hospital. Based on pathological results, VI-RADS was analyzed to assess the accuracy of myodermal infiltrates in bladder cancer. According to the pathological results, the patients were divided into two groups, the apparent diffusion coefficient (ADC) value of the bladder cancer lesion, the maximum tumor diameter, the tumor-bladder wall contact length (TCL), the lesion circumference were measured, the diagnostic efficacy of each quantitative parameter on the muscle infiltration, and the correlation with tumor staging was analyzed.

The area under the ROC curve (AUC) of VI-RADS score for the diagnosis of invasive bladder cancer was 0.925 (95%CI: 0.863-0.986, P<0.05), and when the ≥4 score was taken as the diagnostic criterion, the Yourden index was up to 0.651, the sensitivity was 68.4%, and the specificity was 96.7%. The ADC value, TCL, maximum tumor diameter, lesion circumference of bladder cancer for diagnosing muscle invasion had an AUC of 0.822, 0.865, 0.799, 0.796, the sensitivity was 76.5%, 70.6%, 70.6%, 76.5%, specificity was 84.9%, 94.3%, 90.6%, 90.6%, respectively. The AUC of VI-RADS score combined with various parameters to diagnose myolayer infiltration was 0.980, sensitivity was 100%, specificity was 86.8%. The ADC value, TCL, maximum diameter of the tumor, and lesion circumference of bladder cancer were significantly correlated with tumor stage.

The ADC value, TCL, maximum diameter of the tumor, and circumference of the lesion of bladder cancer can diagnose whether there is muscle layer invasion of bladder cancer to a certain extent, and supplement the VI-RADS scoring system, and the diagnostic value of TCL is the greatest among the parameters.