ESR1 and Tumor Lysis Syndrome: The pooled results showed that TLS presence was negatively associated with the expression of ER (OR = 0.28, 95% CI: 0.14–0.54, p < 0.001; I2 = 55.8%, p = 0.104) and PR (OR = 0.318, 95% CI: 0.22–0.47, p < 0.001; I2 = 0%, p = 0.757).