Footnotes

• Twitter @DebarupDas

• Contributors DD prepared and edited the manuscript and was directly involved in patient management. KB supervised the entire workup, management, manuscript preparation, revision and editing. AS helped with clinical corroboration, diagnosis and supervised the treatment. All authors are in agreement to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

• 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.