Abstract: To the Editor:Cholesterol crystal embolism (CCE) is a systemic disease caused by cholesterol crystal embolization leading to the occlusion of small arteries in a variety of organs.It may occur spontaneously,or more often,after intravascular procedures such as coronary angiography and carotid artery stenting,cardiovascular surgery such as coronary artery bypass grafting or aortic aneurysm surgery.[1] The kidneys were previously reported to be the most frequent target organ for CCE,and renal CCE was found during the course of clinical illness in approximately 50% of patients with CCE.[2]