Positron emission tomography (PET) scan showing pathologic fluorodeoxyglucose (FDG) uptake within the larynx and trachea with extension into the left mainstream bronchus as well as the proximal left upper and lower lobe bronchi. The involvement of bilateral cervical chain lymph nodes was also noted. Diffuse standardized uptake value (SUV) was greatest in the larynx (20.5) (red circle).