Footnotes

• Twitter @drgauravbnigam

• Contributors MS: senior house office; wrote the script, analysed literature. GN: registrar; edited the script, amended references. MF: consultant pathologist; analysed the pathology slides and provided. MA: consultant under whom the patient was admitted; supervised and guided with the structure and content of the script.

• 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.