Caption |
Mammary gland: the neoplasm is composed of closely-packed trabeculae that merge into solid areas and that are separated by a scant amount of fibrovascular stroma with a few entrapped adipocytes and a moderate lymphocytic and plasmacytic inflammation. Neoplastic cells are polygonal, with indistinct cell borders and a moderate amount of strongly amphophilic cytoplasm. The nucleus is central, oval, medium-sized, normochromatic, with a coarsely clumped chromatin and 1-3 small basophilic nucleoli. Anisokaryosis and anisocytosis are mild. Mitotic rate is very high and a few asymmetrical mitoses are identified (arrowhead). |