Footnotes

• Contributors EC drafted the initial manuscript and approved the final manuscript as submitted. GC, FP, ADM, DLG and SS contributed to achieving the clinical diagnosis of the case. GC and EB critically reviewed the manuscript and approved the final manuscript as submitted. All authors approved the final manuscript as submitted and agreed to be accountable for all aspects of the work.

• Funding None declared.

• Competing interests None declared.

• Patient consent Obtained.

• Provenance and peer review Not commissioned; externally peer reviewed.