Even though the number of EGFR per cell for the bladder cancer cell lines was at least an order of magnitude lower than the extremely high EGFR expression level in A431 human epidermoid carcinoma line (∼2.5 × 106 receptors per cell), the effectiveness of MNT in increasing the cytotoxic effect was rather pronounced (20–70 times compared to the free 111In). The gene discussed is EGFR; the disease is urinary bladder carcinoma.