abnormal renal glomerulus basement membrane morphology abnormal renal glomerulus basement membrane thickness 2011-10-14T10:35:12Z MP:0011349 MPheno.ontology abnormal GBM thickness abnormal glomerular basement membrane thickness abnormal glomerulus basement membrane thickness abnormal kidney glomerulus basement membrane thickness csmith increased or decreased width 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