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ABSTRACT: To evaluate whether DW-MRI improves the detection of pelvic lymph nodes metastates in patients with bladder cancer undergoing radical cystectomy.
36 patients with CT scan negative for nodal metastates underwent DW-MRI before surgery. Diagnostic accuracy of DW-MRI was compared with histopathological findings.
Mean ADC value was 0.85 × 10(-3) mm(3)/s in the nodal metastatic group and 1 × 10(-3) mm(3)/s in the nodal non-metastatic group (P = 0.02). The ADC cut-off value, obtained by the ROC curve was 0.86 × 10(-3) mm(3)/s. Patient-based sensitivity, specificity and positive and negative predictive values were 76.4%, 89.4%, 26.6%, and 71.4%, respectively.
DW-MRI may be used to differentiate metastatic from non-metastatic lymph nodes in patients with high-grade bladder cancer.
BJU International 08/2011; 109(7):1031-6. · 3.05 Impact Factor