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A coronary artery aneurysm (CAA) is defined as dilatation of a coronary artery to a diameter >1.5 times that of the adjoining normal coronary artery. Giant CAAs with a diameter ≥50 mm are quite rare. Coronary artery fistulas are also uncommon, and affected patients require prompt diagnosis and treatment. Coronary angiography is the most common method of diagnosing coronary artery fistulas; however,...