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Accuracy of MRI without intracavernosal prostaglandin E1 injection in staging, preoperative evaluation, and operative planning of penile cancer

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Abstract

Purpose

To evaluate the performance of non-erectile MRI in staging and preoperative evaluation of penile carcinomas, compared to postoperative histopathology.

Methods

In this retrospective study, MRI scans of patients who had undergone surgery for penile carcinoma (n = 54) between January 2012 and April 2018 were read by two radiologists; and disagreement was solved in the presence of a third experienced radiologist. Data necessary for preoperative evaluation and staging were collected and compared with final postoperative histology and the type of surgery performed. All MRI had been performed without intracavernosal injection of prostaglandin E1 and with IV Gadolinium, as per local protocol.

Results

54 patients were included in the study (mean age 57.52 ± 12.78). The number of patients with T1, T2, and T3 staging in histopathology were 32, 14, and 8. Moderate interobserver agreement was found for staging, disease-free penile length, and all subsites except urethra, which had weak agreement. Strong agreement of consensus MRI with final histopathological staging was found (49/54, weighted κ = 0.85), with high sensitivity and specificity. Sensitivity and specificity for involvement of corpus spongiosum, corpora cavernosa, and urethra were 95.5% and 93.8%, 87.5% and 97.8%, and 90.9% and 86.1%, respectively. Sensitivity (89.6%) and specificity (100%) of MRI for predicting adequate disease-free penile length were high.

Conclusion

There were acceptable interobserver agreement and good diagnostic performance of MRI for staging and preoperative assessment without intracavernosal injection, especially for higher stages and higher degrees of invasion which require more extensive surgery.

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Data availability

All data and material used are available with the parent Institute.

Code availability

Software used are either freely available online or available with the hospital.

Abbreviations

PGE1 :

Prostaglandin E1

IV :

Intravenous

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Funding

No funds, grants, or other support was received.

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Authors and Affiliations

Authors

Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by P. G, S. M, and A. C. The first draft of the manuscript was written by P. G and all authors commented on previous versions of the manuscript. All authors have read and approved the final manuscript.

Corresponding author

Correspondence to Priya Ghosh.

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Conflicts of interest

The authors have no relevant financial or non-financial interests to disclose.

Ethical approval

This is an observational study. The protocol was submitted to the Institutional Review Board and the Board decided to issue protocol waiver (IRB review exemption) for the study.

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Taken. No patient identifiable data have been used in the submission. Protocol waiver was issued by the IRB.

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Taken. No patient identifiable data have been used in the submission. Protocol waiver was issued by the IRB.

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Ghosh, P., Chandra, A., Mukhopadhyay, S. et al. Accuracy of MRI without intracavernosal prostaglandin E1 injection in staging, preoperative evaluation, and operative planning of penile cancer. Abdom Radiol 46, 4984–4994 (2021). https://doi.org/10.1007/s00261-021-03194-6

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  • DOI: https://doi.org/10.1007/s00261-021-03194-6

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