Fig. 1.From: Sequential occurrence of microscopic polyangiitis and anti-glomerular basement membrane disease in a patient with small cell lung cancer: a case reportLight microscopic examinations of the renal biopsy specimens. a Glomerular endocapillary proliferation was observed, although there was no crescent formation (periodic acid-Schiff staining). b Diffuse tubular degeneration, atrophy, and diffuse cellular infiltration in the interstitium (periodic acid-Schiff staining). c Necrotizing vasculitis (Masson’s trichrome staining)Back to article page