US9131668: Tumor model system useful to study multistage cancer

The invention relates to a method of developing a Tumor Model System. The invention deals with a tumor model system with adhesion deprived cells. This observation provides a new method for primary detection of transformation of adhesion-deprived cells and tumorigenicity. The adhesion-deprived cells can metastasise at distant sites, and the model system includes both the tumor formation and metastasis.