Footnotes

• Contributors CO: principle author. Responsible for content as guarantor. Wrote first draft of the scientific case report, performed literature review and assessed relevance of report to established literature. SW: interpreted lung function and reviewed article. SJ: contributed endoscopic images of tracheal tumour. AM-G: contributed to article writing and review. JH: article supervisor. Oversaw writing of article and contributed to review process.

• Competing interests None.

• Patient consent Obtained.

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