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The use of 68Ga-PET/CT PSMA in the staging of primary and suspected recurrent renal cell carcinoma

  • Sheliyan RaveenthiranEmail author
  • Rachel Esler
  • John Yaxley
  • Sam Kyle
Original Article
Part of the following topical collections:
  1. Oncology – Genitourinary

Abstract

Purpose

The role of 68Ga-PSMA PET/CT in the staging of prostate cancer is well known. PSMA is also overexpressed in the neovasculature of other tumours including renal cell carcinoma (RCC), suggesting there may be a role for the use of 68Ga-PSMA PET/CT. Thus far, there has been limited literature documenting the use of 68Ga-PSMA PET/CT in the investigation and management decisions of RCC.

Methods

This was a retrospective case series of patients who received a 68Ga-PSMA PET/CT scan for staging or restaging of RCC between July 2016 and December 2018. Primary outcome measure was to identify whether 68Ga-PSMA PET/CT changed management compared to standard diagnostic CT imaging. Analysis was based on four categories: (1) identification of new disease, (2) refuting disease on CT imaging, (3) identification of synchronous primaries, and (4) concordance with CT imaging.

Results

38 68Ga-PSMA PET/CT scans met inclusion criteria. Primary staging scans were performed in 16 patients, of which 75% showed avid primary lesions, with the majority of clear cell subtype. Management was changed in 43.8% of patients. CT agreed with 68Ga-PSMA PET/CT in 37.5% of cases. Restaging scans were performed in 22 patients. 40.9% of patients had management changed by results of 68Ga- PSMA PET/CT. CT agreed with 68Ga- PSMA PET/CT in 36.4% of cases. Management was predominantly changed due to the identification of new sites of suspected metastases, as well as the detection of synchronous primaries.

Conclusions

68Ga-PSMA PET/CT directly changed management in 42.1% of cases. Strongest detection rates occurred in those patients with clear cell RCC. The results of this study suggest there may be merit in the use of the modality in the staging of RCC. Further analysis, both with respect to histological confirmation, efficacy and cost-benefit, is required to determine whether there is a role for routine 68Ga-PSMA PET/CT imaging.

Keywords

68Ga-PSMA PET/CT Renal cell carcinoma cancer Staging Restaging 

Notes

Acknowledgements

The authors would like to thank Professor Srinivas Kondalsamy Chennakesavan from University of Queensland and Ricardo Maldonado from PowerStats Pty. Ltd. for their assistance regarding the statistical analysis for this manuscript.

Authors’ contributions

SR collected data and wrote the manuscript. RE and JY provided expert opinion regarding renal cell carcinoma. SK provided extensive information regarding 68Ga-PSMA PET/CT. All authors read and approved the final manuscript.

Compliance with ethical standards

Ethics approval and approval to publish

Ethics approval was obtained from the Royal Brisbane and Women’s Hospital Human Research Ethics Committee ref.: HREC/18/QRBW/395 (ERM: 42076).

Conflict of interest

The authors have no conflicts of interest to declare.

Supplementary material

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ESM 1 (DOCX 20 kb)
259_2019_4432_MOESM2_ESM.docx (24 kb)
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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Royal Brisbane & Women’s HospitalBrisbaneAustralia
  2. 2.Wesley Urology ClinicBrisbaneAustralia
  3. 3.Department of MedicineUniversity of QueenslandBrisbaneAustralia

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