Abstract
The integration of Internet of Things (IoT) technologies with wearable sensors has opened new frontiers in cancer detection and patient monitoring. This chapter explores the design, functionality, and application of various wearable sensor technologies—including electrochemical, thermal, microneedle, optical, ultrasonic, and radar-based sensors—for early cancer detection and continuous health monitoring. These systems enable noninvasive, real-time tracking of physiological and biochemical markers associated with cancer, offering significant advantages in early diagnosis, treatment efficacy assessment, and patient comfort. The chapter also discusses the communication protocols and data security considerations essential for reliable and secure transmission of sensitive health data in wearable IoT systems. Despite challenges such as sensor sensitivity, biocompatibility, and environmental interference, ongoing advancements in materials science, nanotechnology, and wireless communication are rapidly enhancing the capabilities and accessibility of wearable cancer detection technologies.