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MRI of the scrotum: Recommendations of the ESUR Scrotal and Penile Imaging Working Group

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Abstract

Objectives

The Scrotal and Penile Imaging Working Group (SPI-WG) appointed by the board of the European Society of Urogenital Radiology (ESUR) has produced recommendations for magnetic resonance imaging (MRI) of the scrotum.

Methods

The SPI-WG searched for original and review articles published before September 2016 using the Pubmed and Medline databases. Keywords used were ‘magnetic resonance imaging’, 'testis or testicle or testicular', 'scrotum', 'intratesticular', 'paratesticular', 'extratesticular' 'diffusion-weighted', 'dynamic MRI'. Consensus was obtained among the members of the subcommittee. The expert panel proposed recommendations using Oxford Centre for Evidence-Based Medicine 2011 Levels of Evidence.

Results

The recommended MRI protocol should include T1-, T2-weighted imaging, diffusion-weighted imaging and dynamic contrast-enhanced MRI. Scrotal MRI can be clinically applied for lesion characterisation (primary), including both intratesticular and paratesticular masses, differentiation between germ-cell and non-germ-cell neoplasms (evolving), characterisation of the histological type of testicular germ cell neoplasms (TGCNs, in selected cases), local staging of TGCNs (primary), acute scrotum (in selected cases), trauma (in selected cases) and undescended testes (primary).

Conclusions

The ESUR SPI-WG produced this consensus paper in which the existing literature on MRI of the scrotum is reviewed. The recommendations for the optimal imaging technique and clinical indications are presented.

Key points

This report presents recommendations for magnetic resonance imaging (MRI) of the scrotum.

Imaging acquisition protocols and clinical indications are provided.

MRI is becoming established as a worthwhile second-line diagnostic tool for scrotal pathology.

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Abbreviations

3D:

Three-dimensional

ADC:

Apparent diffusion coefficient

CDUS:

Colour Doppler ultrasonography

DCE:

Dynamic contrast-enhanced

DWI:

Diffusion-weighted imaging

ESUR:

European Society of Urogenital Radiology

LCTs:

Leydig cell tumours

LE:

Levels of Evidence

MRI:

Magnetic resonance imaging

OCEBM:

Oxford Centre for Evidence-Based Medicine

SPI-WG:

Scrotal and Penile Imaging Working Group

T1WI:

T1-weighted

T2WI:

T2-weighted

TGCNs:

Testicular germ cell neoplasms

TSI:

Testicular segmental infarction

TSS:

Testis sparing surgery

US:

Ultrasonography

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Correspondence to Athina C. Tsili.

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The scientific guarantor of this publication is Dr. Athina C. Tsili.

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The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.

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No complex statistical methods were necessary for this paper.

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Written informed consent was not required for this study because no patients were included.

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Institutional Review Board approval was not required because this manuscript presents guidelines only and did not require the use of patient-sensitive data.

Methodology

Guidelines based on literature review and expert opinion.

Appendix 1: MRI findings of TGCNs

Appendix 1: MRI findings of TGCNs

Table 3

Table 3 MRI findings suggestive of testicular germ cell neoplasms

Table 4

Table 4 MRI findings useful to differentiate seminomas from nonseminomatous germ cell neoplasms

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Tsili, A.C., Bertolotto, M., Turgut, A.T. et al. MRI of the scrotum: Recommendations of the ESUR Scrotal and Penile Imaging Working Group. Eur Radiol 28, 31–43 (2018). https://doi.org/10.1007/s00330-017-4944-3

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