Of the 14 patients examined, 5 patients had intracapillary IgM monoclonal deposits disease, 3 patients had a neoplastic lymphoplasmacytic infiltration of the interstitium, 3 patients had membranoproliferative glomerulonephritis, 2 patients had amyloidosis, and 1 patient had acute tubular necrosis. Here, CD40LG is linked to membranoproliferative glomerulonephritis.