Abnormal renal arteriole lumen morphology Renal arteriolar lumen cholesterol emboli 2021-06-23T22:11:23Z Needle-like or slit-like clefts within the interior space of arterioles 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 the arteriolar lumen