In addition, the expression of CCR7 has been reported to promote cancer cell metastasis to lymph nodes in nonsmall cell lung cancer[7], breast cancer[8], squamous cell carcinoma of head and neck cancer [9], colorectal cancer[10], prostate cancer [11], esophageal squamous cell cancer[12] and gastric cancer[13]. Here, CCR7 is linked to esophageal squamous cell carcinoma.