Coronary aneurysm disease is defined as the dilation of a coronary artery segment more than 1.5 times the diameter of the adjacent arteries of normal size.It may be diffuse, and affect the whole trajectory of the artery, or localised and only affect a specific arterial segment.It can be found in between 3% and 8% of angiograph studies, with between 0.22% and 1.4% in clinical post-mortems.Three case reports are presented in which the clinical presentation, the angiographic findings, and the pharmacological management are shown to be as diverse as this condition itself.