A deceiving wheeze.

'Wheeze' is a common symptom in both paediatric and adult populations. Unexplained wheeze is concerning and warrants investigation. We present a case of a young girl with childhood asthma suffering with 'persistent wheeze'. This was explained by the presence of a dual aortic arch which only became apparent during her teenage years. This report serves as a reminder to all clinicians that "not all that wheezes is asthma".