RT Journal Article SR Electronic T1 Pneumomediastinum complicating adult-onset measles JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 403 OP 405 DO 10.7861/clinmedicine.18-5-403 VO 18 IS 5 A1 Azara Janmohamed A1 Aula Abbara A1 Rohma Ghani A1 Anne Kinderlerer A1 Thava Sritharan A1 James Hatcher YR 2018 UL http://www.rcpjournals.org/content/18/5/403.abstract AB Adult-onset measles is rare in the UK, particularly in patients with a complete vaccination history.We present a case of a UK-born patient who received all childhood vaccinations, had no history of recent travel or unwell contacts who was diagnosed with measles complicated by pneumomediastinum. This case highlights the need to consider measles in any patient presenting with a constellation of a macular rash, fever and conjunctivitis, regardless of vaccination status. The nature of the rash can provide an important clue to the diagnosis. Liaison with infection specialists facilitates early diagnosis, allowing for appropriate initial investigations, improving clinical management and early infection control precautions being instituted.