Abnormal interlobular vein lumen morphology Cholesterol emboli within interlobular vein lumen 2021-06-02T19:03:13Z Needle-like or slit-like clefts within the interior space of interlobular veins. 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.