Renal cell carcinoma (RCC) is a highly vascularized tumour that is dependent on new vessel formation (angiogenesis) for growth and spread beyond the kidney (metastases). In recent years a new class of drugs have been developed which target the formation of this blood supply, stopping tumour growth and resulting in increased survival. These anti-angiogenic drugs such as Sunitinib, Pazopanib, Axitinib and Everolimus are now the standard of care in metastatic RCC (mRCC) in the United Kingdom.