On the other hand, there was no significant difference in the CD8+TIL density in the stromal area, Foxp3+TIL density in the tumor area, or PD‐L1 expression in the tumor between the adenocarcinomas and squamous cell carcinomas (CD8+TIL density in the stromal area: P = .84; Foxp3+ TIL density in the tumor area: P = .09; tumor PD‐L1 expression: P = .12). Here, CD8A is linked to squamous cell carcinoma.