dcNPs could be freeze‐dried, were highly stable in pharmaceutical vehicles and in the presence of plasma or FBS, accumulated selectively in CD44‐overexpressing A549 (Maiolino, Russo, et al., 2015), HCT‐116 (Russo et al., 2016), MDAMB‐231 cells (Maiolino, Moret, et al., 2015) and in CSSs from different breast cancer cell lines (Gaio et al., 2020). Here, CD44 is linked to breast cancer.