Tasanarong et al. (9), reported urinary NGAL above the threshold of 117 mg/mL measured after 6 h had a sensitivity of 94%, a specificity of 78% and an area under the curve (AUC) of 0.84 for predicting CI-AKI in the patients undergoing elective cardiac catheterization. The gene discussed is LCN2; the disease is acute kidney injury.