Neutrophil gelatinase-associated lipocalin (NGAL) is a new marker for acute kidney injury (AKI) which has been studied after cardiac surgery, liver transplantation and contrast media administration, as well as in intensive care unit (ICU) patients (in heterogeneous patient groups and in patients with septic vs. nonseptic AKI), in unselected patients who present to the emergency department and in critically ill multiple trauma patients [11-22]. Here, LCN2 is linked to acute kidney injury.