Footnotes

• Correction notice This paper has been amended since it was published Online First. We published the author's name incorrectly, this has now been corrected.

• Twitter Follow Erwin Khoo Jiayuan at @erwinkhoo

• Contributors The author collated the clinical information and images for the patient, and compiled the manuscript.

• Competing interests None declared.

• Patient consent Parental/guardian consent obtained.

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