Figure 8b. Adenocarcinoma in a 56-year-old man. (a) Thin-section CT image obtained at the level of the aortopulmonary window shows a 14-mm nodular ground-glass opacity with no solid component in the upper lobe of the right lung. (b) Photomicrograph of a histologic specimen (original magnification, x40; hematoxylin-eosin stain) shows adenocarcinoma with dense sclerosis.