Necrosis (from the Greek νέκρωσις 'death, the stage of dying, the act of killing' from νεκρός 'dead') is a form of cell injury which results in the premature death of cells in living tissue by autolysis. Necrosis (from the Greek νέκρωσις 'death, the stage of dying, the act of killing' from νεκρός 'dead') is a form of cell injury which results in the premature death of cells in living tissue by autolysis.