Urinary neutrophil gelatinase-associated lipocalin as a biomarker to monitor renal function in patients with obstructive ureteral calculi.

uNGAL can be used as a biomarker to monitor the renal function effectively when serum creatinine (sCr) was within normal limits. And double-J ureteral stent can be considered as a protective factor to renal function in patients with obstructive ureteral calculi presenting renal colic.