Chest computed tomography of DMM lesions of Case 3. Figure-path-case-3 Pathological findings of VATS-resected specimen of Case 3. (a) Low-power image showed focal proliferation of cuboidal atypical cells with round nuclei and prominent nucleoli surrounded by fibrous tissue. Keratinization, plasmodesmata, and glandular construction were absent. (b) High-power image of DMM. IHC demonstrated positivity for (c) calretinin and (d) CAM5.2. (ZIP 10747 kb)