RPS6KA3 and breast cancer: The expression of RSK2 was obviously different between the luminal subtype and basal subtype of breast cancer (pooled OR = 0.25, 95% CI: 0.08–0.80, Cochran’s Q test p = 0.06, I2 = 63.5%) (Figure 2C), and no distinctive RSK2 expression was found between luminal A and luminal B subtypes of breast cancer (pooled OR = 0.73, 95% CI: 0.26–2.01, Cochran’s Q test p = 0.05, I2 = 66.5%) (Figure 2D).