Prediction of Postprostatectomy Biochemical Recurrence Using Quantitative Ultrasound Shear Wave Elastography Imaging

Area of Science:

• Urology
• Medical Imaging
• Oncology

Background:

• Radical prostatectomy is a common treatment for localized prostate cancer.
• Predicting biochemical recurrence is crucial for patient management.
• Current prognostic tools have limitations in accuracy.

Purpose of the Study:

• To evaluate the prognostic significance of transrectal ultrasound shear wave elastography (SWE) in predicting biochemical recurrence.
• To assess if SWE measurements enhance existing prognostic models for prostate cancer recurrence.

Main Methods:

• Retrospective analysis of patients undergoing radical prostatectomy.
• Tissue stiffness measured using transrectal ultrasound shear wave elastography.
• Cox regression analysis and Kaplan-Meier curves used to assess recurrence-free survival.
• Multivariate analysis incorporating clinicopathological and imaging factors.

Main Results:

• Biochemical recurrence occurred at an average of 26.3 months post-surgery.
• A tissue stiffness cutoff of 144.85 kPa showed significant predictive value (p < 0.05).
• SWE was a significant predictor in multivariate analysis, improving the predictive nomogram's C-index (0.74 vs. 0.70).

Conclusions:

• Quantitative ultrasound shear wave elastography-measured tissue stiffness is a significant imaging marker.
• SWE enhances the predictive ability of clinical and histopathological factors for biochemical recurrence.
• SWE offers improved prognostic capability for patients undergoing radical prostatectomy.