Tumor progression is the process by which a normal cell transforms into a cancerous cell and subsequently grows and spreads throughout the body. This process involves a series of genetic mutations and changes in the cell's behavior that allow it to evade the body's natural defenses and proliferate uncontrollably. Tumor progression is a complex and dynamic process that can be influenced by a variety of factors, including genetic predisposition, environmental exposures, and lifestyle choices. Understanding the mechanisms of tumor progression is crucial for developing effective therapies to treat and prevent cancer.