Figure 7a. Noguchi type F adenocarcinoma (papillary adenocarcinoma with compressive and destructive growth) in a 48-year-old woman. (a) Transaxial thin-section (1-mm collimation) CT scan (lung window) obtained at the level of the basal segmental arteries shows a 25-mm lobulated nodule in the left lower lobe. (b) Low-power photomicrograph (original magnification, x12; H-E stain) of a surgical specimen shows papillary carcinoma composed of branching true papillae. The surgical specimens showed hilar nodal metastasis, and intrapulmonary recurrence was seen at postoperative follow-up.