CT radiomics-based SVM model predicts post-BCG recurrence in high-grade NMIBC

CT radiomics SVM model predicted 5-year recurrence after BCG for high-grade NMIBC (AUC 0.82, 95%CI 0.77-0.86) in internal validation, with external validation confirming. Retrospective.

• Retrospective study: 136 internal patients (95 training, 41 validation) and 51 external test cases, all with contrast-enhanced CT pre-TURBT.
• Key clinical predictors: tumor size (OR 3.11, 95%CI 1.16-8.34), number of lesions (OR 4.56, 95%CI 1.52-13.70), calcification (OR 3.41, 95%CI 1.15-10.15).
• Limitation: single-center internal cohort, small external validation set; retrospective design.

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