This issue of PET Clinics focuses on FDG-PET/CT Imaging in Infectious and Inflammatory Disorders, and is edited by Drs. Soren Hess and Lars Gormsen. Articles will include: Patient preparation and patient related challenges in infectious/inflammatory disease; Systemic infections (Fever/bacteremia of unknown origin, immunocompromised patients); Infections in bone and prosthetic joints; The infected heart; Inflammatory bowel disease; Pulmonary inflammatory diseases (sarcoidosis including cardiac and COPD); Infection and inflammation imaging: Beyond FDG; Polymyalgia rheumatica; Low grade inflammation; Large vessel vasculitis; Tuberculosis; and more!