Abnormal glomerular capillary morphology Glomerular capillary wall duplication without cellular interposition 2020-11-29T13:59:59Z Double contouring of the original glomerular basement membrane (GBM)/additional layer(s) of overlying basement membrane matrix, with or without endocapillary hypercellularity and no evidence of interposed migrated cells (mesangial, endothelial, monocytes) between the layers of original GBM and de novo GBM.