Circulating Tumor Cells, From Biotech Innovation to Clinical Utility Part B, Volume 392 in the International Review of Cell and Molecular Biology series, highlights new advances in the field, with this new volume presenting interesting chapters on a variety of timely topics, including Circulating Tumor Cells in Lung Cancer: integrating stemness and heterogeneity to improve clinical utility, Multi-omic Features and Clustering Phenotypes of Circulating Tumor Cells Associated with Metastasis and Clinical Outcomes, CTCs in CRC: updates, Proteomics and post-translational modification analysis in CTCs, Latest advances of CTC studies in prostate cancer, and Epigenetics and CTCs: new biomarkers and impact on tumor biology.