Footnotes

• Acknowledgement The authors acknowledge Dr Vinod Bhandari and Dr Manjushree Bhandari, Chairperson, SAIMS for their guidance of the manuscript.

• Contributors PMP: clinical case, literature search, figures. PJ: literature search, writing. MJP: writing, literature search, figures.

• Competing interests None declared.

• Patient consent Obtained.

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