Fig. 4
Magnetic resonance angiography demonstrates a hypovascular tumor in the right paratracheal space and compressing the esophagus and trachea. Thoracic angiography shows no significantly abnormal lymph adenopathy in the mediastinum and lower neck and no invasion of greater vessel (a, b). Whole-body positron emission tomographic scan showing a 18F-fluorodeoxyglucose-avid area at the right lower paratracheal region (maximum standardized uptake value, 2.2/1 hour) (c, d). Tc-99m thyroid scan shows only cold nodule over right lobe of thyroid (e, f)