Montpellier University 1 article published in JoVE Cancer Research Circulating Tumor Cell Lines: an Innovative Tool for Fundamental and Translational Research Guillaume Belthier*1, Zeinab Homayed*1, Céline Bouclier1, Muriel Asari1, Julie Pannequin1 1Department of Physiology and Cancer, Institute for Functional Genomics, Montpellier University Culturing CTCs allows a deeper functional characterization of cancer, through assaying specific marker expression, and assessing drug resistance and the ability to colonize the liver among other possibilities. Overall, CTC culture could be a promising clinical tool for personalized medicine to improve patient outcome.