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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.
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