The C-C motif chemokine ligand 22 (CCL22) and C-C chemokine receptor 7 (CCR7) have been reported to be highly expressed in tongue squamous cell carcinoma (TSCC) and associated with poor prognosis such as lymph node metastasis (Kimura et al., 2021; Qi Wang et al., 2021). The gene discussed is CCL22; the disease is tongue squamous cell carcinoma.