Figure 16a. LCNEC in a 57-year-old man. (a) Axial CT scan (5.0-mm section thickness) obtained at the level of the thoracic inlet shows a 32-mm-diameter mass with a lobulated margin in the right upper lobe. (b) CT scan obtained at the level of the right upper lobar bronchus shows enlarged lymph nodes in the right lower paratracheal area (arrowhead) and at the right hilum (arrow). At mediastinoscopic examination, the right lower paratracheal nodes contained malignant cells.