SSB and neoplasm: However, given that the La/SSB target antigen of the radiolabeled chDAB4 mAb is revealed preferentially in dead tumor cells in vivo (Al-Ejeh et al. 2009a; Al-Ejeh et al. 2014; Staudacher et al. 2014a; Staudacher et al. 2014b; Staudacher et al. 2018), the antibody radioconjugate will not be further processed unless it is by a non-targeted viable cell type.