Cancer remains one of the biggest threats to our ever-increasing population; few lives remain untouched by this disease. An estimated 12.7 million new cases were diagnosed worldwide in 2008 and cancer caused an estimated 7.6 million deaths in the same year (IACR, 2008; WHO, 2008). Most of these deaths are a result of cancer that has spread from the original lesion to colonize a new site in the body; indeed metastatic cancers remain the most difficult to treat, with the worst prognoses.
Prompted by the observation that different cancers actually spread to very specific and often very...