Footnotes

• Contributors AV: lead author with involvement in initial endoscopy, conception and drafting the manuscript. KDC: pathologist involved in obtaining the images and revising the manuscript. KKL: pathologist involved in histological examination and making the initial diagnosis as well as revising the manuscript. RR: endoscopist responsible for initial detection and biopsy of specimen as well as in revising and finalising the manuscript.

• Competing interests None.

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