Figure 1

Representative case of a small lung adenocarcinoma presenting as solid nodule. (A) Axial CT image showing a solid nodule. (B) The region of interest (ROI) was manually placed using AZE Virtual Place software. (C) This lesion revealed lepidic predominant histology. (D) Three acinar components were observed in the central area (marked by blue dots), and a lepidic component was seen surrounding the acinar component.