Fig. 1From: The possible involvement of intestine-derived IgA1: a case of IgA nephropathy associated with Crohn’s diseaseHistological findings of the renal tissues. a IgA, (b) Mesangial matrix expansion and fibrocellular crescent formations were observed in glomeruli with periodic acid-Schiff (PAS) staining (400×). c Slight changes of interstitial fibrosis and arteriole sclerosis with Masson staining (40×)Back to article page