Fig. 1From: C3 glomerulonephritis associated with monoclonal gammopathy of renal significance: case reporta Periodic acid-Schiff: lobular pattern with cell proliferation, a few cases of endocapillary type and others mesangial, with isolated polymorphonuclear neutrophils. Arterioles with focal subendothelial hyalinosis. Marked interstitial fibrosis and tubular atrophy. b Periodic acid Schiff staining showed focal double contour (arrow) in most of the glomeruli (× 60)Back to article page