Figure 12b. T1 squamous cell carcinoma with extrathoracic metastases in a 64-year-old man. (a) Conventional (7-mm collimation) CT scan (lung window) obtained at the level of the liver dome shows a small, 10-mm nodule in the right lower lobe (arrow). Note the areas of ground-glass attenuation and irregular linear areas of hyperattenuation in the surrounding lung, findings that suggest underlying pulmonary fibrosis. (b) CT scan obtained at the level of the right portal vein shows a small metastatic nodule in the liver (arrowhead) and metastatic lymphadenopathy in the left gastric area (arrow).