abnormal blood vessel endothelium morphology abnormal glomerular capillary morphology abnormal glomerular capillary endothelium morphology 2011-11-10T02:54:02Z any structural anomaly of the thin, extremely flattened layer of cells that line the interior surface of glomerular capillaries and is densely perforated by large transcellular pores (aka fenestrae or fenestrations) that, unlike those of other fenestrated capillaries, are generally thought to lack diaphragms csmith MPheno.ontology MP:0011453