“…Proliferative glomerulonephritis with cellular and fibrocellular crescents and segmental necrotizing lesions have been described in up to 30% of patients (4,5,9,22,23). However, we have not seen these lesions in ITG when systemic diseases such as cryoglobulinemia, paraproteinemia, and SLE have been excluded (6,8,16). Most important, the glomeruli, tubulointerstitium, and vessels are negative for amyloid by Congo red and thioflavin-T stains.…”