RPS6KA6 and bladder transitional cell carcinoma: Subcellular studies indicate that RSK4 overexpression enhances the invasive and metastatic capabilities of bladder cancer cell lines, and vice versa.<h4>Conclusions</h4>This study elucidates the expression pattern and mechanism of action of RSK4 in bladder urothelial carcinoma, confirming that its overexpression is a key factor for predicting poor prognosis.