a–c (Patient No. 15): CT coronary angiography (CTCA) curved planar reformatted (CPR) (a and c) and axial (b) images in a 4 years boy with KD at presentation show a fusiform aneurysm in distal left circumflex coronary artery (LCx) (1 in a and b) with normal calibre of proximal LCx (2 in a). There seems in a stenotic lesion in the osteo-proximal segment of LCx in figure a, however, this is due to an off-centre centreline. Fusiform aneurysm is also seen in proximal left anterior descending coronary artery (LAD) (3 in b and c). Transthoracic echocardiography (TTE) demonstrated aneurysmal dilatation of proximal LAD; LCx, however, could not be evaluated. d (Patient No. 19): CTCA CPR image of LCx (d) in a 5 years boy with KD at presentation shows fusiform aneurysm of proximal (4 in d) and distal (5 in d) LCx with normal intervening segment. Although TTE showed a aneurysm of proximal LCx, it failed to demonstrate involvement of distal LCx.