The document discusses the fundamentals of geriatric oncology, highlighting the significance of aging in cancer treatment, particularly for patients over 60 years old who often face increased comorbidities and altered pharmacokinetics. It emphasizes the importance of comprehensive geriatric assessment (CGA) to improve treatment outcomes and quality of life for older cancer patients, and underscores the necessity of a multidisciplinary approach in their care. Key cancer treatments and their impacts, as well as tools for assessment and screening tailored for older adults, are also covered.