Fig. 1From: CT features and quantitative analysis of subsolid nodule lung adenocarcinoma for pathological classification predictionAtypical adenomatous hyperplasia (AAH). One ground-glass nodule was found in the upper lobe of the left lung; its shape is similar to a circle, and the boundary is clear (a, b). Pathology (c): alveolar epithelial cells changing into atypical adenomatous hyperplasia are observed under a microscope. (HE staining, × 200)Back to article page