^ANCA-negative crescentic IgAN versus ANCA-associated crescentic glomerulonephritis; ^c^ANCA-positive crescentic IgAN versus ANCA-associated crescentic glomerulonephritis.  [^00]: ANCA, antineutrophil cytoplasmic autoantibody; IgAN, IgA nephropathy; TIN, tubulointerstitial nephritis; ESRD, end-stage renal disease.