FCGR3A and neoplasm: Phenotypic characterization of tumor-infiltrating NK cells from resected tumors showed that, in comparison to the pre-injected NK cell product (CD16+CD103- NK cells), intratumoral NK cells displayed a progressive acquisition of CD103 (CD16+CD103+) concomitant with CD16 loss (CD16-CD103+ NK cells) (Fig. 3D).