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Findings in 1,123 Men with Preoperative 68Ga-Prostate-Specific Membrane Antigen Positron Emission Tomography/Computerized Tomography and Multiparametric Magnetic Resonance Imaging Compared to Totally Embedded Radical Prostatectomy Histopathology: Implications for the Diagnosis and Management of Prostate Cancer.

Authors
  • Raveenthiran, S1, 2
  • Yaxley, W J2, 3
  • Franklin, T4
  • Coughlin, G4
  • Roberts, M1, 2, 5, 6
  • Gianduzzo, T2, 7
  • Kua, B4
  • Samaratunga, H2, 8
  • Delahunt, B9
  • Egevad, L10
  • Wong, D5, 11
  • McEwan, L11
  • Brown, N11
  • Parkinson, R11
  • Esler, R2, 4, 5
  • Yaxley, J W2, 4, 5
  • 1 Department of Urology, Redcliffe Hospital, Redcliffe, Queensland, Australia. , (Australia)
  • 2 The University of Queensland, Faculty of Medicine, Brisbane, Queensland, Australia. , (Australia)
  • 3 Queen Elizabeth II Jubilee Hospital, Brisbane, Queensland, Australia. , (Australia)
  • 4 Wesley Urology Clinic, Brisbane, Queensland, Australia. , (Australia)
  • 5 Royal Brisbane & Women's Hospital, Brisbane, Queensland, Australia. , (Australia)
  • 6 UQ Centre for Clinical Research, Brisbane, Queensland, Australia. , (Australia)
  • 7 Brisbane Prostate Clinic, Brisbane, Queensland, Australia. , (Australia)
  • 8 Aquesta Uropathology, Brisbane, Queensland, Australia. , (Australia)
  • 9 Department of Pathology and Molecular Medicine, Wellington School of Medicine and Health Sciences, Wellington, New Zealand. , (New Zealand)
  • 10 Department of Oncological Pathology, Karolineska Institute, Stockholm, Sweden. , (Sweden)
  • 11 Wesley Medical Imaging, Brisbane, Queensland, Australia. , (Australia)
Type
Published Article
Journal
The Journal of urology
Publication Date
Mar 01, 2022
Volume
207
Issue
3
Pages
573–580
Identifiers
DOI: 10.1097/JU.0000000000002293
PMID: 34694140
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Multiparametric magnetic resonance imaging (mpMRI) fails to identify some men with significant prostate cancer. Prostate-specific membrane antigen positron emission tomography/computerized tomography (PSMA PET/CT) is recommended for staging of prostate cancer, but its additional benefit above mpMRI alone in local evaluation for prostate cancer is unclear. The study aim was to evaluate the ability of mpMRI and PSMA PET/CT individually and in combination, to predict tumor location and Gleason score ≥3+4 on robot-assisted laparoscopic radical prostatectomy (RALP) histology. We retrospectively reviewed 1,123 men with a preoperative mpMRI and 68Ga-PSMA PET/CT prior to a RALP. Tumor locations were collected from both imaging modalities and compared to totally embedded prostate histology. Lowest apparent diffusion coefficient value on mpMRI and the highest maximum standardized uptake value (SUVmax) on 68Ga-PSMA PET/CT were collected on the index lesions to perform analysis on detection rates. Median prostate specific antigen was 6. Median Gleason score on biopsy and RALP histology was 4+3. The index lesion and multifocal tumor detection were similar between mpMRI and 68Ga-PSMA PET/CT (p=0.10; p=0.11). When combining mpMRI and 68Ga-PSMA PET/CT, index Gleason score ≥3+4 cancer at RALP was identified in 92%. Only 10% of patients with Gleason score ≤3+4 on biopsy with an SUVmax <5 were upgraded to ≥4+3 on RALP histology, compared to 90% if the SUVmax was >11. The addition of a diagnostic 68Ga-PSMA PET/CT to mpMRI can improve the detection of significant prostate cancer and improve the ability to identify men suitable for active surveillance.

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