abnormal renal corpuscle morphology abnormal renal glomerulus basement membrane morphology 2011-10-14T10:29:55Z MP:0011348 MPheno.ontology abnormal GBM morphology abnormal glomerular basement membrane morphology abnormal glomerulus basement membrane morphology abnormal kidney glomerulus basement membrane morphology any structural anomaly of the layer of extracellular matrix that lies between the endothelium of the glomerular capillaries and the podocytes of the inner or visceral layer of the Bowman capsule; it is a fusion of the endothelial cell and podocyte basal laminas and acts as a physical barrier and an ion-selective filter csmith