anding of oncology, focusing on the biological and clinical aspects of cancer. It begins by defining cancer as a group of diseases characterized by uncontrolled cell growth, evasion of normal regulatory mechanisms, and the potential to invade and metastasize to distant organs.

The lecture discusses the hallmarks of cancer, including sustained proliferative signaling, evasion of apoptosis, limitless replicative potential, angiogenesis, and tissue invasion. It also introduces the concepts of oncogenes and tumor suppressor genes, highlighting how genetic mutations can trigger malignant transformation. Environmental and lifestyle factors contributing to cancer development, such as smoking, radiation, viral infections, and carcinogenic chemicals, are also covered.

Key pathological features such as differentiation, tumor grading, and staging are briefly introduced to provide a framework for understanding tumor behavior. The lecture emphasizes the importance of early detection, screening, and diagnosis, which play a critical role in patient outcomes.

By the end of this session, viewers will have a solid grasp of the basic mechanisms of cancer development, its clinical significance, and the principles that guide diagnosis and management. This lecture serves as an essential starting point for deeper studies in oncology and pa