Footnotes

• EMB-M and LMB are joint first authors.

• Contributors EMB-M: literature search, manuscript drafting, sourced and selection of the images. LMB: literature search, manuscript drafting and facilitated the patient completing the consent form. BSG made the initial diagnosis, provided critical review and suggestions of the manuscript and the images. COG suggested the writing up of this case and made a critical review of the manuscript and the images. INV was in charge of the patient during hospitalisation, suggested the writing up of this case and provided critical review of the manuscript. MAGT was in charge of the patient during hospitalisation, suggested the writing up of this case and provided critical review 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.

• Competing interests None declared.

• Provenance and peer review Not commissioned. Externally peer reviewed by Tom Moullaali, Edinburgh, UK, and Tom Hughes, Cardiff, UK.