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

Figure 5 Photomicrographs of in situ adenoid cystic carcinoma and microglandular adenosis. A: In situ adenoid cystic carcinoma haphazardly scattered in fat tissue, showing cribriform or tubular proliferation of tumor cells. Just next to the in situ components, remaining microglandular adenosis (MGA) showed small tubular glands (arrows) [hematoxylin and eosin (H&E) staining, magnification: 40 ×]; B: In situ adenoid cystic carcinoma was noted in the right. MGA showed small tubular glands with single epithelial lining and retained lumen in the left (H&E staining, magnification: 100 ×).