dilated renal tubules abnormal proximal convoluted tubule morphology dilated proximal convoluted tubules MP:0009050 MPheno.ontology dilated proximal convoluted kidney tubules dilated proximal convoluted renal tubules dilated proximal renal tubules proximal convoluted tubule ectasia proximal renal tubule dilation stretched or widened aperture of the luminal space of the convoluted portion of the duct system of the nephron that extends from the renal glomerular capsule in the kidney cortex into the kidney medulla where it joins the loop of Henle