dilated renal tubules abnormal distal convoluted tubule morphology dilated distal convoluted tubules MP:0009051 MPheno.ontology dilated distal convoluted kidney tubules dilated distal convoluted renal tubules dilated distal renal tubules distal convoluted tubule ectasia distal convoluted tubules dilation distal renal tubule dilation stretched or widened aperture of the luminal space of the convoluted portion of the duct system of the nephron between the ascending portion of the loop of Henle and the collecting duct system in the kidney cortex