What is a Cytotoxic T cell? A cytotoxic T cell (also known as TC, cytotoxic T lymphocyte, CTL, T-killer cell, cytolytic T cell, CD8+ T-cell or killer T cell) is a T lymphocyte (a type of white blood cell) that kills cancer cells, cells infected with intracellular pathogens (such as viruses or bacteria), and other … Read more