Footnotes

• Handling editor Ellen J Weber

• Correction notice This paper has been updated since first published. In the answer part of this Image challenge, the correct answer option was mistakenly listed as ‘D. Tongue Cancer’. It has now been revised to the correct answer which is ‘C. Lingual herpes zoster’.

• Contributors My colleague and I provide equal contribution.

• 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.

• Patient consent for publication Not required.

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