KLRB1 and carcinoma of esophagus: As shown in Figure 3(a), KLRB1 was expressed at a higher level in elderly patients in BRCA, KIRP, LIHC, SKCM, STAD, THCA, thymoma (THYM), and UCEC, while the expression of KLRB1 in elderly patients was significantly lower than that in the younger age group in esophageal carcinoma (ESCA), LGG, and LUAD.