NCAM1 and neoplasm: Here, our study showed for the first time that within GC, the frequencies of CD3+CD56+ NKT-like cells were significantly decreased, and low levels of CD3+CD56+ NKT-like cells were positively correlated with patients' poor overall survival, suggesting that the frequencies of tumor-infiltrating CD3+CD56+ NKT-like cells may be a good marker of GC patients' prognosis.