CCR7 and neoplasm: This migration of CTLs requires a tracking receptor switch from lymphoid tissue‐ (CD62L and CCR7) to effector site‐homing receptors (e.g., CXCR3, CCR8, CCR5, CCR2, and CCR1) upon antigen priming.[19] In this regard, we further examined the expression of CCR7 and CXCR3 (a major Teff‐associated chemokine receptor) by CTLs in the dLNs of tumor‐bearing control, RARα‐KO, and RARα‐TG mice (Figure 3A–C).