Footnotes

• Contributors RH wrote the initial manuscript. CM and SH were involved in the preparation of the final manuscript. MU provided input on the images. All contributors were involved in the care of the patient.

• 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; internally peer reviewed.