Abnormal cortical radial artery lumen morphology Cortical radial artery lumen cholesterol emboli 2021-06-23T20:02:50Z Needle-like or slit-like clefts within the interior space of cortical radial arteries (interlobular 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.