Footnotes

• Contributors AT wrote the first draft of the manuscript. AM, FF, IB and IR followed clinically the patient. Radiologic images were acquired from FMM. AM made the revision of the manuscript. FF critically revised the manuscript and gave final approval.

• 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; internally peer reviewed.