Footnotes

• Contributors HR prepared the manuscript, did literature search and was part of the management team for this patient. SA is the corresponding author and supervised the manuscript preparation, prepared endoscopy images and revised the final draft. NK identified the pathology, prepared histopathology images and reviewed the manuscript. AH was part of the management team of the patient, and helped in the preparation of endoscopy images.

• 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.

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