Final answer:
The classic renal lesion of preeclampsia is glomerular endotheliosis, which refers to the damage and swelling of the endothelial cells in the glomeruli of the kidneys.
Step-by-step explanation:
The classic renal lesion of preeclampsia is glomerular endotheliosis. Glomerular endotheliosis refers to the damage and swelling of the endothelial cells in the glomeruli of the kidneys. This condition is commonly seen in preeclampsia, which is a pregnancy-related disorder characterized by high blood pressure and organ damage.