CXCL12 and bladder transitional cell carcinoma: ↓ CXCL12 in BlCa tumors than controls (Sun et al., 2021b; Du et al., 2021c) vs. In tumors, ↑ CXCL12 was associated with ↑ stage (Sun et al., 2021b; Liu et al., 2021); In tumors, ↑ CXCL12 was associated with ↑ lymph node (N2 than N0) (Liu et al., 2021); In tumors, ↑ CXCL12 was associated with ↓ prognosis (Sun et al., 2021b; Liu et al., 2021)