This study aimed to characterize PD1 expression profiles in tumor biospecimens obtained from patients with resectable adenocarcinoma of the esophagogastric junction (AEG) and to assess whether TIL and/or tumoral PD1 expression levels correlate with patient prognosis, including disease-free survival, OS, and other clinicopathologic parameters. This evidence concerns the gene PDCD1 and neoplasm.