Cancer is a group of diseases characterized by the uncontrolled growth and spread of abnormal cells. If the spread is not controlled, it can result in death. There are over 100 different types of cancer, and each is classified by the type of cell that is initially affected.

Cancer screening involves testing for signs of a particular type of cancer in individuals without any symptoms. Screening aims to detect cancer at an early and more treatable stage, potentially improving outcomes and survival rates.