<unk>  is defined as a dimished diameter of the lumen of the renal<unk> .
Renal<unk>  of >70% is considered hemodynamically significant.
Renal artery stenosis
Renal amyloidosis
Polycystic kidney disease
Renal vein thrombosis
Hypertensive nephropathy
Renovascular disease
Renal cell carcinoma
Renal oncocytoma