An antibody, also known as an immunoglobulin, is a large Y-shaped protein produced by the immune system to neutralize pathogens such as bacteria and viruses.

Cancer is a broad term used to describe a group of diseases characterized by the uncontrolled growth and spread of abnormal cells in the body.

Positron emission tomography (PET) is a medical imaging technique that allows visualization and measurement of metabolic processes in the body.