Coexistence of anti-neutrophil cytoplasmic antibody-associated glomerulonephritis and membranous glomerulopathy.

The association of renal Wegener's granulomatosis with other glomerular diseases is very rare. A case of anti-neutrophil cytoplasmic antibody-associated necrotizing glomerulonephritis superimposed on a membranous glomerulopathy in a patient with systemic Wegener's granulomatosis is reported. Renal failure was corrected by immunosuppressive therapy treatment, but a non-nephrotic-range proteinuria persisted for several months. The association of membranous glomerulopathy with anti-glomerular basement membrane disease and other autoimmune diseases is well described; however, anti-neutrophil cytoplasmic antibody-associated vasculitis superimposed on membranous glomerulopathy has not been reported previously.