CD8A and gastric cancer: Moreover, most studies on TILs in gastric carcinomas (GCs) have been hampered by manual interpretation [8, 9, 10, 11, 12, 13, 14], study with tissue microarrays [9, 11, 15, 16, 17, 18], small numbers of patients [10, 19, 20, 21], or a focus on a specific subtype of immune cells, such as FOXP3+ regulatory T cells [15, 16, 20, 22, 23], CD33+ myeloid cells [12], or CD57+ NK cells [19, 24, 25], rather than CD8+ T cells, the immune cells that most significantly predicted prognosis in recent meta‐analyses of GC data [26, 27].