LCN2 and cervical squamous intraepithelial neoplasia: Although a definition based on the change in creatinine value, which is generally accepted in the literature, was used for the definition of CIN in our study, another limitation is that more specific laboratory markers of contrast-induced nephropathy such as neutrophil gelatinase-associated lipocalin (NGAL) and Cystatin C were not evaluated [46].