Footnotes

• Contributors All authors contributed significantly to the conception, design, analysis and interpretation of the case report. Each author has reviewed and approved the final version of the manuscript. CRDB contributed to the conception and design of the case report, acquisition of data, drafting of the manuscript and critical revision of the intellectual content. FDDC participated in the acquisition of clinical data, contributed to the drafting and critical revision of the manuscript and provided important intellectual content. LM provided substantial contributions to the analysis and interpretation of pathological findings, critically reviewed and revised the manuscript and approved the final version for submission. MBDC, MdCT and RKS contributed to the literature review and provided critical feedback on the manuscript. RG supervised the entire process, provided guidance in the design and execution of the case report, critically reviewed and revised the manuscript and gave final approval for submission.

• Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests None declared.

• Provenance and peer review Not commissioned; externally peer reviewed by Arani Nitkunan, London, UK.