Furthermore, galanin receptor 2 (GALR2) is a G protein-coupled receptor that induces tumor growth and proliferation in SCCHN (squamous cell carcinoma of the head and neck) [45], and GALR2 has been identified as a novel target and biomarker for prostate, colon, and breast cancer screening [46]. Here, GALR2 is linked to head and neck squamous cell carcinoma.