The high expression of viral immune modulation genes such as K2 (viral interleukin-6), K5 (modulator of immune recognition), K7 (viral inhibitor of apoptosis) and ORF75 (degradation of ND10 protein) in the lesions, could have severely hindered the immune system from eliminating these KSHV infected cells and contributed to the development of cancer. This evidence concerns the gene IL6 and cancer.