Footnotes

• Contributors Each author has contributed sufficiently. DY: design, preparation of manuscript and submission. HM: described dermoscopic and histopathological findings. AB: preparation of manuscript and images. RB: Guidance, preparation and revision 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 None declared.

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