This chapter comprehensively explores how nanotechnology is reshaping the landscape of cancer imaging and therapeutics. Nanomedicine offers a promising avenue for personalized cancer treatment by integrating diagnostic and therapeutic approaches. The discussion delves into the distinctive characteristics, applications, and challenges associated with various nanoparticles, counting organic (liposomes, micelles) and inorganic (gold, iron oxide, silica, quantum dots, carbon nanotubes), and within the field of oncology. Emphasis is placed on how these nanomaterials facilitate advanced cancer treatments by enhancing drug delivery systems, enabling precise photothermal therapy, and advancing imaging techniques such as computed tomography (CT), magnetic resonance imaging (MRI), and fluorescence imaging. This chapter underscores the potential of nanoparticles to elevate therapeutic efficacy, mitigate systemic toxicity, and offer controlled and targeted drug release, thus opening new avenues for effective cancer treatment. It also addresses critical issues related to the biocompatibility and safety of nanomaterials, highlighting the necessity for ongoing research to optimize their clinical applications. The chapter concludes by considering the future of nanotechnology in predictive oncology and tailored medicine, envisioning a transformative impact on early detection, individualized therapies, and overall cancer care.