In 2006 a new drug called sunitinib, a tyrosine kinase inhibitor, transformed treatment options. It targets the development of new blood vessels within the cancer. Although the results with this drug are impressive, patients develop resistance a median after 11 months to the drug, relapse and die of renal cancer. It is currently standard practice to switch to everolimus when resistance to sunitinib occurs; this is associated with clear clinical benefit. However the median time to progression with everolimus is 4 months in previously treated patients, therefore further improvement in treating patients is required. The optimal way of achieving this is to increase the efficacy of everolimus by adding agents which directly target the cause of resistance to sunitinib.