Footnotes

• Correction notice This article has been corrected since it published Online First. Figure one has been moved to the question section of the content.

• Contributors All authors were involved in the clinical care of the patient and identifying the case as appropriate for submission. JH reviewed the literature and wrote the article. JAL, TCS and GC critically reviewed manuscript drafts and approved the final article for submission. SU selected the images and wrote the captions. JH and JAL are responsible for the overall content as guarantors.

• 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.