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Tumor Heterogeneity Predicts Metastatic Potential in Colorectal Cancer

Tumors continuously evolve to maintain growth; secondary mutations facilitate this process, resulting in high tumor heterogeneity.

December 5, 2017

Tumors continuously evolve to maintain growth; secondary mutations facilitate this process, resulting in high tumor heterogeneity. In this study, we compared mutations in paired primary and metastatic colorectal cancer tumor samples to determine whether tumor heterogeneity can predict tumor metastasis. 

Somatic variations in 46 pairs of matched primary-liver metastatic tumors and 42 primary tumors without metastasis were analyzed by whole-exome sequencing. Tumor clonality was estimated from single-nucleotide and copy-number variations. The correlation between clinical parameters of patients and clonal heterogeneity in liver metastasis was evaluated. 

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