Footnotes

• Contributors JS and MR were directly responsible for the initial diagnosis; JS, MR and DM were responsible for the surgical intervention. AMV, JS and DM were all involved in the follow-up of the patient. All authors were major contributors in writing the manuscript. All authors read and approved the final manuscript.

• 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.