ERBB2 and neoplasm: These micelles, containing paclitaxel (PTX) and Herceptin, exhibited remarkable stability within the bloodstream and the tumor microenvironment (TME), precisely targeting HER2+ positive cells.91 Concurrently, Garg et al., devised traceable polymeric micelles termed PEO–poly(α-benzyl carboxylate-ε-caprolactone) (PEO–PBCL) by incorporating pendant benzyl carboxylate groups into the PCL segment of PEO–PCL.