Footnotes

• Contributors ID: diagnosed the patient and all authors treated the patient. YG: analysed the imaging studies. AS: prepared and submitted the manuscript which was seen and approved by ID and YG.

• 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.