CX3CL1 and squamous cell carcinoma: Zhou et al. 2016 report it but only show the expression of CX3CL1 in adenocarcinoma 21, which generates uncertainty with respect to the reported findings and Su et al. 2018 also reported CX3CL1 positivity in an immunohistochemical squamous cell carcinoma tissue 19 sample without assessing the intracellular localization of this molecule.