Single‐cell RNA Sequencing Identified Novel Nr4a1+ Ear2+ Anti‐Inflammatory Macrophage Phenotype under Myeloid‐TLR4 Dependent Regulation in Anti‐Glomerular Basement Membrane (GBM) Crescentic Glomerulonephritis (cGN). Here, TLR4 is linked to crescentic glomerulonephritis.