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Comparative Study
. 2021 Nov;39(11):4109-4116.
doi: 10.1007/s00345-021-03770-x. Epub 2021 Jun 24.

External validation of two MRI-based risk calculators in prostate cancer diagnosis

Anna-Lena Petersmann  1 , Sebastiaan Remmers  2 , Tilman Klein  1 , Panagiota Manava  3 , Clemens Huettenbrink  1 , Sascha A Pahernik  1 , Florian A Distler  4
Affiliations
Comparative Study

External validation of two MRI-based risk calculators in prostate cancer diagnosis

Anna-Lena Petersmann et al. World J Urol. 2021 Nov.

Abstract

Background: The diagnosis of (significant) prostate cancer ((s)PC) is impeded by overdiagnosis and unnecessary biopsy. Risk calculators (RC) have been developed to mitigate these issues. Contemporary RCs integrate clinical characteristics with mpMRI findings.

Objective: To validate two of these models-the MRI-ERSPC-RC-3/4 and the risk model of van Leeuwen.

Methods: 265 men with clinical suspicion of PC were enrolled. Every patient received a prebiopsy mpMRI, which was reported according to PI-RADS v2.1, followed by MRI/TRUS fusion-biopsy. Cancers with ISUP grade ≥ 2 were classified as sPC.

Outcome measurements and statistical analysis: Statistical analysis was performed by comparing discrimination, calibration, and clinical utility RESULTS: There was no significant difference in discrimination between the RCs. The MRI-ERSPC-RC-3/4-RC showed a nearly ideal calibration-slope (0.94; 95% CI 0.68-1.20) than the van Leeuwen model (0.70; 95% CI 0.52-0.88). Within a threshold range up to 9% for a sPC, the MRI-ERSPC-RC-3/4-RC shows a greater net benefit than the van Leeuwen model. From 10 to 15%, the van Leeuwen model showed a higher net benefit compared to the MRI-ERSP-3/4-RC. For a risk threshold of 15%, the van Leeuwen model would avoid 24% vs. 14% compared to the MRI-ERSPC-RC-3/4 model; 6% vs. 5% sPC would be overlooked, respectively.

Conclusion: Both risk models supply accurate results and reduce the number of biopsies and basically no sPC were overlooked. The van Leeuwen model suggests a better balance between unnecessary biopsies and overlooked sPC at thresholds range of 10-15%. The MRI-ERSPC-RC-3/4 risk model provides better overall calibration.

Keywords: Biopsy; Diagnostic imaging; European Randomized Study of Screening for Prostate Cancer; Magnetic resonance imaging; Risk calculator.

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References

    1. Ferlay J, Soerjomataram I, Dikshit R, Eser S, Mathers C, Rebelo M et al (2015) Cancer incidence and mortality worldwide: sources, methods and major patterns in GLOBOCAN 2012. Int J Cancer 136(5):E359–E386 - DOI
    1. Mottet N, Bellmunt J, Bolla M, Briers E, Cumberbatch MG, De Santis M et al (2017) EAU-ESTRO-SIOG guidelines on prostate cancer. Part 1: screening, diagnosis, and local treatment with curative intent. Eur Urol 71(4):618–629 - DOI
    1. Schröder FH, Hugosson J, Roobol MJ, Tammela TL, Ciatto S, Nelen V et al (2009) Screening and prostate-cancer mortality in a randomized European study. N Engl J Med 360(13):1320–1328 - DOI
    1. Distler FA, Radtke JP, Bonekamp D, Kesch C, Schlemmer HP, Wieczorek K et al (2017) The Value of PSA density in combination with PI-RADSTM for the accuracy of prostate cancer prediction. J Urol 198(3):575–582 - DOI
    1. Washino S, Okochi T, Saito K, Konishi T, Hirai M, Kobayashi Y et al (2017) Combination of prostate imaging reporting and data system (PI-RADS) score and prostate-specific antigen (PSA) density predicts biopsy outcome in prostate biopsy naïve patients. BJU Int 119(2):225–233 - DOI

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