<prompt> Tram track appearance on histopathology of kidney is seen inMembranous nephropathyMembranoproliferative glomerulonephritisIgA nephropathyCresentric glomerulonephritis  <response>: Refer Robbins page no 920PHOLOGY The glomeruli are large and hypercellular. The hypercellu- larity is produced both by proliferation of cells in the mesangium and so-called endocapillary proliferation involving capillary endothelium and infiltrating leukocytes. The glomeruli have an accentuated lobular appearance due to the proliferating mesangial cells and increased mesangial matrix Fig. 20-16. The GBM is thickened, and often shows a double- contour or tram-track appearance, especially evident in silver or PAS stains. This is caused by duplication of the basement membrane also commonly referred to as splitting, usually as the result of new basement membrane synthesis in response to subendothelial deposits of immune complexes. Between the duplicated basement membranes there is inclu- sion or interposition of cellular elements, which can be of mesangial, endothelial, or leukocytic origin. Such interposition also gives rise to the appearance of split basement mem- branes 