Detection of incidental prostate cancer or urothelial carcinoma extension in urinary bladder cancer patients by using multiparametric MRI: A retrospective study using prostate imaging reporting and data system version 2.0

Sang Eun Yoon, Byung Chul Kang, Hyun Hae Cho, Sanghui Park

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose The study aimed to investigate the role of Prostate Imaging Reporting and Data System version 2 (PI-RADS v2) in predicting incidental prostate cancer (PCa) or urothelial carcinoma (UCa) extension in urinary bladder (UB) cancer patients. Materials and Methods A total of 72 UB cancer patients who underwent radical cystoprostatectomy and 3 Tesla multiparametric MRI before surgery were enrolled. PI-RADS v2 ratings were assigned by two independent radiologists. All prostate specimens were examined by a single pathologist. We compared the multiparametric MRI findings rated using PI-RADS v2 with the pathologic data. Results Of the 72 UB cancer patients, 29 had incidental PCa (40.3%) and 20 showed UCa extension (27.8%), with an overlap for 3 patients. With a score of 4 as the cut-off value for predicting incidental PCa, the diagnostic accuracy was 65.3%, specificity was 90.7%, and positive predictive value (PPV) was 66.7%. The diagnostic accuracy for incidental UCa extension was 47.2%, specificity was 92.3%, and PPV was 83.3%. Conclusion Despite the low diagnostic accuracy, the PPV and specificity were relatively high. Therefore, PI-RADS v2 scores of 1, 2, or 3 may help exclude the probability of incidental PCa or UCa extension.

Original languageEnglish
Pages (from-to)610-619
Number of pages10
JournalJournal of the Korean Society of Radiology
Volume81
Issue number3
DOIs
StatePublished - May 2020

Keywords

  • Cystectomy
  • Magnetic Resonance Imaging
  • Prostate Cancer
  • Urinary Bladder Cancer

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