Drs Sinha and Balakumar have provided a reminder of BCG scar reactivation as a diagnostic marker of Kawasaki disease (KD).¹ This potentially serious disease has no definitive diagnostic test and it is not unusual for the diagnosis to be delayed. The authors also alluded to incomplete KD, of which there is increasing recognition and which may be associated with a higher chance of cardiac complications.²

We recently reviewed the cases of KD presenting in South Wales and found an alarming increase in the number of patients developing coronary artery …