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Contributors VD wrote the draft paper including questions and discussion and reviewed the existing literature. VT summarised the clinical case and obtained radiological images. SR revised the draft paper and provided specialist expertise on discussion of the condition. DM revised and proofread the draft paper. RR revised the draft paper and did the final review.
Competing interests None declared.
Patient consent Obtained.
Provenance and peer review Commissioned; externally peer-reviewed. This paper was reviewed by Alasdair Coles, Cambridge, UK.