Abnormal arcuate vein lumen morphology Arcuate vein lumen cholesterol emboli 2021-06-23T19:27:11Z Needle-like or slit-like clefts within the interior space of arcuate veins 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. Cholesterol emboli within arcuate vein lumen