Cancer Stem Cells, Volume 141 in the Advances in Cancer Research series, presents the latest release in this ongoing, well-regarded serial that provides invaluable information on the exciting and fast-moving field of cancer research. Topics covered in this new release include SIX-EYA-DACH network control of cancer stem cell properties, Dormancy and the cancer cell niche, Clonal hematopoiesis: A hematopoietic stem cell disorder of aging, Stringent assays to study human breast cancer stem cells, Regulation of breast cancer stem cell specification and maintenance by hypoxia-inducible factors, Cancer stem cells in breast and prostate: fact or fiction, and much more.