Long-term clinical course and histopathologic scoring in acute crescentic glomerulonephritis.

If nontreated or misdiagnosed, acute crescentic glomerulonephritis, clinically defined as rapidly progressive glomerulonephritis (RPGN), may led to end-stage renal failure (ESRD) within a short time. Histologically, it is characterized by accumulation of inflammatory cells in combination with proliferation of epithelial cells in the glomerulus. According to the proposed immunopathogenic classification by Couser (7), predominantly the immunopathogenic type III without immune deposits often represents the renal manifestation of a systemic vasculitic disease, for example, polyarteriitis or Wegener's granulomatosis. Having investigated 75 patients with acute crescentic glomerulonephritis in respect to their long-term results, we conclude that an early histopathologic diagnosis by using an activity and chronicity score system may not only be a predictor for renal prognosis but also be a valid supposition for differentiated immunosuppressive therapy in supplement to the clinical data on renal function. A therapeutic advantage of a plasmapheresis therapy additionally to the immunosuppressive therapy could not be proven.