The mean value of urinary NGAL in HRS (380.6 ± 132.32 μg/g creatinine) was significantly higher compared to prerenal azotemia patients (161.15 ± 60.75 μg/g creatinine, P = 0.0015) and significantly lower compared to ATN patients (580.51 ± 238.75, P = 0.0001). This evidence concerns the gene LCN2 and oculocutaneous albinism type 1.