This book provides a comprehensive overview of the latest research on the molecular players in the tumor microenvironment, including MicroRNAs, estrogen, Caveolin-1, Nitric Oxide, RANK/RANKL signaling, , COX-2 Signaling, Renin–angiotensin system, and more. Taken alongside its companion volumes, Tumor Microenvironment: Molecular Players – Part B updates us on what we know about the tumor microenvironment, as well as future directions. This book is essential reading for advanced cell biology and cancer biology students as well as researchers seeking an update on research in the tumor microenvironment.