CXC motif chemokine ligand 10 (CXCL10), also known as IP-10, is a cytokine of the CXC family whose pro-inflammatory effects on tissue infiltration were first demonstrated in hepatitis C. CXC motif chemokine ligand 9 (CXCL9), or monokine induced by gamma interferon (MIG), is a chemokine of the same family whose effects have been described in tumor models. The gene discussed is CXCL9; the disease is neoplasm.