NF-κΒ and NF-κΒ-regulated gene products, including Bcl-xl, cyclin D1, matrix metalloproteinase-9 (MMP-9), vascular endothelial growth factor (VEGF), and cyclooxygenase-2 (COX-2), are involved in tumor cell resistance to radiotherapy [20, 21]. Here, PTGS2 is linked to neoplasm.