Type 1 has subendothelial electron-dense deposits of immunoglobulins and complements
It occurs in patients with SLE , hepatitis B and other diseases
Type 2 has electron-dense GBM deposition in a confluent ribbon-like fashion
Type 2 is due to activation of alternative pathway of complement activation
Figure 8. Pathology of membranoproliferative glomerulonephritis type I. (a) Light microscopy shows a hypercellular glomerulus with accentuated lobular architecture and a small cellular crescent (methenamine silver).