Dilatation of an arterial segment to a diameter at least 1.5 times that of the adjacent normal coronary artery is known as coronary artery ectasia, also known as aneurysmal coronary artery disease. Regarding its aetiology, clinical manifestations, and treatment, CAE has confused doctors since the time Morgagni first identified it in 1761.Atherosclerosis is the most frequent cause of coronary artery ectasia, however it can also be caused by other conditions such as Kawasaki disease, viral septic emboli, connective tissue disease and arteritis.

AIM:
The aim of the present study was to estimate the prevalence of coronary artery ectasia in patients who underwent coronary computed tomography International Cardiac Centre in Alexandria and their clinical characteristics.

PATIENT AND METHODS
The Prevalence of CAE was 1.7%, predominantly male are most commonly affected. Hypertension has an effect of developing CAE while Diabetic mellitus is inverse to that.
Our data revealed that 62% of CAE were situated on RCA, 52% on LAD, 22% on CX, and one aneurysm was placed on LM. CTCA detected intraluminal thrombi in 2% of the patients. Our dataset, we found that, those with CAE had noticeably more CACS in comparison to those without CAE.