To study the potential chemoattractant activity of NGAL, we tested the ability of the conditioned medium from human anaplastic thyroid carcinoma (ATC)-derived BHT101 cells, containing large amounts of NGAL [20], to induce human monocytic THP-1 cells chemotaxis in transwell migration assays. This evidence concerns the gene LCN2 and thyroid gland undifferentiated (anaplastic) carcinoma.