Notably, all bladder cancer cell lines expressed HSPA8 at high levels, and the expression levels of muscle‐invasive BC cell lines (e.g., T24, UMUC3 and HT‐1197) were significantly higher than those of nonmuscle‐invasive BC cell lines (e.g., RT112 and RT‐4; Figure 1A). The gene discussed is HSPA8; the disease is urinary bladder cancer.