CCR7, the most studied lymph node homing chemokine receptor, is expressed by certain cancer cells, in particular hematopoietic malignancies and lymph node metastases [3], as well as naïve T and B cells, while CCL19 and CCL21, the chemokine ligands for this receptor, are expressed in the T cell areas of lymph nodes [11]. The gene discussed is CCL19; the disease is cancer.