LCN2 and neoplasm: Serum NGAL was also significantly associated with maximal tumor size (p < 0.001) with median values (IQR) ranging from 99 ng/ml (79–137) for tumors ≤3 cm, to 110 ng/ml (86–158) for tumors between 3 and 4.5 cm, 113 ng/mL (81–147) for tumors between 4.5 and 6 cm and 159 ng/mL (116–214) for tumors > 6 cm.