Assessing cancer risk in the anterior part of the prostate using micro-ultrasound: validation of a novel distinct protocol.
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- doi: 10.1007/s00345-023-04591-w
- issn: 0724-4983
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Prostate gland Glandula prostata Prostata Gland, ProstateCiter ce document
S. Schaer et al., « Assessing cancer risk in the anterior part of the prostate using micro-ultrasound: validation of a novel distinct protocol. », Serveur académique Lausannois, ID : 10.1007/s00345-023-04591-w
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To develop and validate a micro-ultrasound risk score that predicts the likelihood of significant prostate cancer in the anterior zone. Patients were enrolled from three expert institutions familiar with micro-ultrasound. The study was conducted in two phases. First, the PRI-MUS anterior score was developed by assessing selected prostate videos from patients who subsequently underwent radical prostatectomy. Second, seven urology readers with varying levels of experience in micro-ultrasound examination evaluated prostate loops according to the PRI-MUS anterior score. Each reader watched the videos and recorded the likelihood of the presence of significant cancer in the anterior part of the prostate in a three-point scale. The coherence among the readers was calculated using the Fleiss kappa and the Cronbach alpha. A total of 102 selected prostate scans were used to develop the risk assessment for anterior zone cancer in the prostate. The score comprised three categories: likely, equivocal, and unlikely. The median (IQR) sensitivity, specificity, positive predictive value, and negative predictive value for the seven readers were 72% (68-84), 68% (64-84), 75% (72-81), and 73% (71-80), respectively. The mean SD ROC AUC was 0.75 ± 2%, while the Fleiss kappa and the Cronbach alpha were 0.179 and 0.56, respectively. Micro-ultrasound can detect cancerous lesions in the anterior part of the prostate. When combined with the PRI-MUS protocol to assess the peripheral part, it enables an assessment of the entire prostate gland. Pending external validation, the PRI-MUS anterior score developed in this study might be implemented in clinical practice.