This document provides an overview of lung cancer presented by Dr. Zeba Firdous. It discusses the epidemiology, risk factors, clinical features, investigations, pathological classification, staging, treatment options including surgery, chemotherapy and palliative care, differences between young and elderly patients, and the role of geriatricians in caring for older lung cancer patients. Lung cancer is a leading cause of cancer deaths worldwide and often presents at advanced stages with poor survival rates. Thorough evaluation, early detection, and multidisciplinary care are important to optimize outcomes.