RT-PCR analysis of CXCR4, FGF-2, VEGF-A, EGFR, and ERK2 (MAPK1) revealed significantly higher expression of three genes (i.e., CXCR4, FGF-2, and ERK2) in IR/Ipsi-tumor and IR/Contra-tumor groups compared to the control groups. The gene discussed is CXCR4; the disease is neoplasm.