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MRI-based nomogram predicting the probability of diagnosing a clinically significant Prostate Cancer with MRI-US fusion biopsy

Login to Access Video or Poster Abstract: MP03-09
Sources of Funding: none

Introduction

Identifying clinically significant prostate cancers is the main objective of prostate cancer diagnosis. The aim of this study was to develop, to internally validate and to calibrate a nomogram to predict the probability of detecting a clinically significant prostate cancer.

Methods

Prospectively collected data from 3 tertiary referral center series of 478 consecutive patients who underwent MRI-US fusion biopsy using the UroStation (Koelis, France) were used to build the nomogram. A logistic regression model is created to identify predictors of PCa diagnosis with MRI-US fusion biopsy. Predictive accuracy was quantified using the concordance index (CI). Internal validation with 200 bootstrap resampling and calibration plot were performed.

Results

Mean age was 66.3 yrs (± 7.98) and mean PSA levels were 9.8 ng/mL (± 7.98). The overall PCa detection rate was 57.4%. _x000D_ Age, PSA serum levels, PIRADS score at MRI report, number of targeted and number of systematic cores taken were included in the model (Figure 1). Predictive accuracy was 0.81. On internal validation the CI was 0.81 and predicted probability was well calibrated (Figure 2). _x000D_ Limitations include the lack of external validation and the absence of patients with races different by Caucasian in the development cohort._x000D_

Conclusions

Predicting the risk of a clinically significant PCa is the goal of physicians. This nomogram provides a high accuracy in predicting the probability of diagnosing a clinically significant PCa with MRI-US fusion biopsy. The ease to use makes this nomogram a clinical tool for both patients and physicians.

Funding

none

Authors
Giuseppe Simone
Rocco Papalia
Emanuela Altobelli
Alessandro Giacobbe
Luigi Benecchi
Gabriele Tuderti
Leonardo Misuraca
Salvatore Guaglianone
Devis Collura
Giovanni Muto
Michele Gallucci
Mariaconsiglia Ferriero
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