Yttrium (90Y) clivatuzumab tetraxetan (trade name hPAM4-Cide) is a humanized monoclonal antibody-drug conjugate designed for the treatment of pancreatic cancer. The antibody part, clivatuzumab (targeted at MUC1), is conjugated with tetraxetan, a chelator for yttrium-90, a radioisotope which destroys the tumour cells.'-mexi-' (melanoma): Ecromeximab§ Yttrium (90Y) clivatuzumab tetraxetan (trade name hPAM4-Cide) is a humanized monoclonal antibody-drug conjugate designed for the treatment of pancreatic cancer. The antibody part, clivatuzumab (targeted at MUC1), is conjugated with tetraxetan, a chelator for yttrium-90, a radioisotope which destroys the tumour cells.