An updated model for predicting side-specific extraprostatic extension in the era of MRI-targeted biopsy

Alberto Martini*, Lieke Wever, Timo F W Soeterik, Arnas Rakauskas, Christian Daniel Fankhauser, Josias Bastian Grogg, Enrico Checcucci, Daniele Amparore, Luciano Haiquel, Lara Rodriguez-Sanchez, Guillaume Ploussard, Peng Qiang, Andres Affentranger, Alessandro Marquis, Giancarlo Marra, Otto Ettala, Fabio Zattoni, Ugo Giovanni Falagario, Mario De Angelis, Claudia KeschMaria Apfelbeck, Tarek Al-Hammouri, Alexander Kretschmer, Veeru Kasivisvanathan, Felix Preisser, Emilie Lefebvre, Jonathan Olivier, Jan Philipp Radtke, Giuseppe Carrieri, Fabrizio Dal Moro, Peter Boström, Ivan Jambor, Paolo Gontero, Peter K Chiu, Hubert John, Petr Macek, Francesco Porpiglia, Thomas Hermanns, Roderick C N van den Bergh, Jean-Paul A van Basten, Young Academic Urologists working group on Prostate Cancer of the European Association of Urology, Giorgio Gandaglia, Massimo Valerio*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)

Abstract

PURPOSE: 

Accurate prediction of extraprostatic extension (EPE) is pivotal for surgical planning. Herein, we aimed to provide an updated model for predicting EPE among patients diagnosed with MRI-targeted biopsy.

MATERIALS AND METHODS: 

We analyzed a multi-institutional dataset of men with clinically localized prostate cancer diagnosed by MRI-targeted biopsy and subsequently underwent prostatectomy. To develop a side-specific predictive model, we considered the prostatic lobes separately. A multivariable logistic regression analysis was fitted to predict side-specific EPE. The decision curve analysis was used to evaluate the net clinical benefit. Finally, a regression tree was employed to identify three risk categories to assist urologists in selecting candidates for nerve-sparing, incremental nerve sparing and non-nerve-sparing surgery.

RESULTS: 

Overall, data from 3169 hemi-prostates were considered, after the exclusion of prostatic lobes with no biopsy-documented tumor. EPE was present on final pathology in 1,094 (34%) cases. Among these, MRI was able to predict EPE correctly in 568 (52%) cases. A model including PSA, maximum diameter of the index lesion, presence of EPE on MRI, highest ISUP grade in the ipsilateral hemi-prostate, and percentage of positive cores in the ipsilateral hemi-prostate achieved an AUC of 81% after internal validation. Overall, 566, 577, and 2,026 observations fell in the low-, intermediate- and high-risk groups for EPE, as identified by the regression tree. The EPE rate across the groups was: 5.1%, 14.9%, and 48% for the low-, intermediate- and high-risk group, respectively.

CONCLUSION:

 In this study we present an update of the first side-specific MRI-based nomogram for the prediction of extraprostatic extension together with updated risk categories to help clinicians in deciding on the best approach to nerve-preservation.

Original languageEnglish
Pages (from-to)520-524
Number of pages5
JournalProstate Cancer and Prostatic Diseases
Volume27
Issue number3
Early online date5 Jan 2024
DOIs
Publication statusPublished - Sept 2024

Bibliographical note

Publisher Copyright:
© The Author(s), under exclusive licence to Springer Nature Limited 2024.

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