Breast adenoid cystic carcinoma arising in microglandular adenosis: A case report and review of literature

Figure 4 Photomicrographs of the adenoid cystic carcinoma. A: The tumor was composed of cribriform (arrowheads) and solid nests (arrows) in the fibrous stroma (asterisk), [hematoxylin and eosin (H&E) staining, magnification: 40 ×]; B: Myoepithelial cells formed cribriform or solid basaloid growth, whereas ductal epithelial cells were lining small ductule-like lumen (arrows) (H&E staining, magnification: 200 ×); C and D: The cribriform space contained Periodic acid Schiff positive basement membrane-like materials (asterisk) in invasive (H&E staining, magnification: 100 ×) and in situ components (H&E staining, magnification: 200 ×).