Abnormal medullary peritubular capillary lumen morphology Medullary peritubular capillary lumen cholesterol emboli 2021-06-23T19:09:26Z Needle-like or slit-like clefts within the interior space of peritubular capillaries located in the medulla 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 medullary peritubular capillary lumen