Abnormal arcuate artery lumen morphology Arcuate artery lumen cholesterol emboli 2021-06-23T22:23:31Z Cholesterol emboli within arcuate arterial lumen Needle-like or slit-like clefts within the interior space of arcuate arteries of the kidney. Cholesterol emboli are visualized as clear spaces (cholesterol clefts) where the cholesterol crystals have been dissolved by routine processing. Acute lesions can be accompanied by inflammation and fibrin.