Cancer stem cells: An enigma in head and neck cancer.

The author reflects on a accumulated evidence revealing that tumor growth and propagation are dependent on a subset of cells called cancer stem cells (CSCs). He believes that the identification and characterization of the CSCs through molecular markers can contribute in formulating effective targeted therapies as well as prevent tumor recurrences. He also stresses that CSCs are obtained from the normal stem cells of the body which played a crucial role in an organogenesis of an individual.