Regression can occur through multiple mechanisms, including cell apoptosis, necrosis, and autophagy. Apoptosis is a programmed cell death process that helps in removing damaged or unnecessary cells. Necrosis is an uncontrolled cell death that can result from injury or disease. Autophagy is a process where cells degrade their own components to survive under stressful conditions. All these mechanisms contribute to the regression of tissues in various contexts.
