Objective: To elucidate the accuracy of MRI and MRI-ultrasound fusion guided targeted biopsy (TBx) on risk stratification in men who underwent subsequent radical prostatectomy (RP).
Materials And Methods: A single-center, retrospective study was performed in men at risk for prostate cancer who (n = 140) underwent TBx and RP between November 2012 and August 2018. Comparisons were made between patients clinically staged by preoperative MRI and TBx Gleason grade group (GGG) and stage after RP. Multivariable regression was performed to identify factors associated with MRI and TBx compared to RP grading, staging, and consistency with National Comprehensive Cancer Network (NCCN) risk stratification.
Results: There was an increase in NCCN risk stratification in 47 men (33.6%) and a decrease in 17 men (12.1%) compared to the resected prostate. GGG upgrading and downgrading occurred in 35 (25.0%) and 31 men (22.1%), respectively. Upstaging occurred in 41 men (29.3%). In adjusted analysis for age, BMI, PSA Density (PSAD), median maximal diameter of the regions of interest, and PIRADS, men with PIRADS 4 were less likely to be upgraded (OR 0.26, 95% CI 0.08-0.81, P = .020) than PIRADS 3. PSAD ≥ 0.15 ng/mL/cc was associated with upstaging (OR 3.92, 95% CI 1.60-9.62, P = .003).
Conclusion: Accurate risk stratification is critical for disease management, mandated by the increasing use of active surveillance, partial gland ablation, and androgen deprivation therapy with radiation therapy for men with unfavorable intermediate and high-risk prostate cancer. This study confirms the need for advances in imaging and biomarker to increase the accuracy of pretreatment staging.
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| http://dx.doi.org/10.1016/j.urology.2019.07.049 | DOI Listing |
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