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Related Concept Videos

Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

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Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
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Use of MRI-ultrasound Fusion to Achieve Targeted Prostate Biopsy
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How Prostate Cancer Growth Patterns Impact Detection and Interreader Agreement on Multiparametric MRI.

Daniel Hausmann1, N Rupp2, B Kuzmanic3

  • 1Department of Radiology, Kantonsspital Baden, affiliated Hospital for Research and Teaching of the Faculty of Medicine of the University of Zurich, Baden, Switzerland; Department of Clinical Radiology and Nuclear Medicine, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.

Academic Radiology
|December 6, 2024
PubMed
Summary
This summary is machine-generated.

Multiparametric MRI (mpMRI) can miss aggressive prostate cancer (PCa) with infiltrative growth. Expansive growth lesions show lower ADC values and higher PI-RADS scores, aiding detection.

Keywords:
DetectionDiffusion restrictionExpansive growthInfiltrative growthMultiparametric Magnetic Resonance ImagingPI-RADSProstatic Neoplasm

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Area of Science:

  • Radiology
  • Pathology
  • Oncology

Background:

  • Multiparametric MRI (mpMRI) enhances prostate cancer (PCa) detection over systematic biopsy.
  • Aggressive PCa forms, particularly those with infiltrative growth (INF), can be missed by mpMRI.
  • INF lesions exhibit less restricted diffusion compared to other growth patterns.

Purpose of the Study:

  • To investigate the impact of prostate carcinoma growth patterns on lesion detection using mpMRI.
  • To correlate histopathological growth patterns (expansive vs. infiltrative) with mpMRI findings, including PI-RADS scores and apparent diffusion coefficient (ADC) values.

Main Methods:

  • Retrospective analysis of 52 radical prostatectomy patients with preoperative mpMRI.
  • Independent classification of lesion growth patterns (expansive/INF) by two pathologists.
  • Independent PI-RADS v2.1 classification by two radiologists based on pathological localization.
  • Measurement of ADC values correlated with histopathology; interreader agreement assessed using Cohen's Kappa.

Main Results:

  • High agreement for both growth pattern classification (κ=0.88) and PI-RADS scoring (κ=0.90).
  • PI-RADS scores significantly correlated with expansive (EXP) growth patterns.
  • EXP lesions had lower ADC values (0.83×10-3 mm2/s) than INF lesions (0.97×10-3 mm2/s).
  • Infiltrative lesions were more frequently missed on T2-weighted imaging (29% vs. 4%).

Conclusions:

  • Prostate cancer with infiltrative growth patterns is more frequently missed by mpMRI.
  • Expansive growth patterns are associated with lower ADC values and higher PI-RADS scores.
  • Understanding growth patterns improves the interpretation of mpMRI for aggressive PCa detection.