Footnotes

• Contributors All authors have made substantial contribution to the interpretation of data for the work and to the drafting and revising of the work. DP was responsible for clinical management of the patient, conception, design, data acquisition and interpretation, and revision of the manuscript. MUK was responsible for data acquisition and interpretation, and drafting of the manuscript. OA was responsible for data interpretation and contributed to the manuscript in relation to the imaging aspects. All authors approved the final version of the 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.

• Case reports provide a valuable learning resource for the scientific community and can indicate areas of interest for future research. They should not be used in isolation to guide treatment choices or public health policy.

• Competing interests DP has received consultancy fees from Mereo BioPharma and CSL Behring.

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