Footnotes

• Handling editor Iskander Chaudhry.

• Contributors NGV reviewed and submitted the virtual case. EG and FP have written the discussion section, while NS, AGS and CV were responsible for the figure, its description and the differential diagnosis.

• 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.

• Patient consent for publication Obtained.

• Provenance and peer review Not commissioned; externally peer reviewed.