The purpose of this e-learning module is to develop a consensus based on evidence from existing systematic reviews, to make health care providers aware of the value and the appropriateness of the use of FDG PET/CT positron emission tomography (PET) or PET combined with computed tomography (PET/CT) using 2-fluoro-deoxy-D-glucose (FDG) labeled with 18-Fluorine in the management of patients affected by cancer.