Caption |
Mammary gland: the mammary gland is expanded by a nodular, partly encapsulated, locally invasive, densely cellular neoplasm with a prominent papillary pattern. The neoplasm is composed of closely-packed papillae lined by a one cell-thick cuboidal epithelium supported by a moderate amount of dense fibrovascular stroma. Neoplastic cells are cuboidal to polygonal, with ill-defined cell borders and a moderate amount of acidophilic cytoplasm that often contains lipid vacuoles. The nucleus is central, round, and medium-size. |