CCL18 and head and neck squamous cell carcinoma: In our previous study, we found that MTDH plays a very important role in the invasion, metastasis and EMT of SCCHN cells.38, 39 To identify a potential target molecule of CCL18 which may mediate its biological effects, we examined the mRNA and protein expression of MTDH in rhCCL18‐treated Tu686, 6‐10B and FaDu cells.