LCN2 and acute kidney injury: Neutrophil gelatinase-associated lipocalin (NGAL), particularly in its 25 kDa form, which is exclusively released by renal tubules [9], has emerged as a promising biomarker with the potential to serve as a point-of-care solution for the early detection of acute kidney injury (AKI) in critically ill patients and as a guide for the initiation and/or weaning of renal replacement therapy (RRT).