Lung cancer is the most common cancer worldwide and is associated with significant morbidity and mortality. In recent years, there have been important developments in the techniques used to diagnose lung cancer and in the treatment options available, allowing more people to be given anti-cancer treatment with the aim of increasing survival rates. This article provides an overview of lung cancer, including epidemiology, risk factors, diagnosis and treatment. It aims to provide healthcare professionals with information to improve care delivery and patients’ quality of life.