Biosensors are expected to play an expanding role in the early detection and treatment of cancer. Addressing cancer molecular diagnostics from the perspective of biosensors and biodetection, this book examines the technology and applications of a range of sensor systems, including optical, electrochemical, and optomechanical sensors. Each chapter presents a different biosensor-based technology and then explains their limitations, how the sensors are created, how they function, and how they can be applied. The text also reviews allied subjects, such as ligands, molecular markers, and microfluidics, that are essential to understanding and developing new sensing technologies.