Caption |
Mammary gland: the mammary gland is expanded by a small, unenencapsulated, densely cellular, expensile neoplasm arising in an hyperplastic alveolar nodule. The neoplasm is composed of solid areas with secondary lumen and a few closely-packed glands that are lined by a one cell-thick cuboidal epithelium and are supported by a scant amount of fibrovascular stroma. Epithelial cells in the hyperplastic alveolar nodule (in the right and lower right portions of the photomicrograph) show more atypia than generally observed in typical hyperplastic alveolar nodules. Also, the contours of the alveoli in the hyperplastic alveolar nodule are more irregular than typically observed in an hyperplastic alveolar nodule. However, cells do not pile-up disorderly and the overall pattern of the normal mammary gland can still be identified. |
