Coronary artery ectasia in a child after arterial switch operation for transposition of the great arteries and suspected multisystem inflammatory syndrome in children associated with COVID-19: a case report.

This rare case demonstrates that also patients with TGA after the arterial switch operation (ASO) can develop coronary artery dilatation in association with MIS-C. The most interesting finding in this patient was that the origins of the reimplanted coronary arteries were not dilated. We speculate that scar tissue formation in the area of coronary artery transfer after ASO has prevented proximal coronary artery dilation.