Right breast fungating mass, circumscribed, 20 cm.
Case Discussion
Malignant phyllodes tumours are fibroepithelial neoplasms with malignant stromal growth. Criteria for malignancy included stromal overgrowth, stromal hypercellularity, stromal cell atypia, mitotic activity, and invasive tumour borders. In this case, areas of osteoid and cartilage with malignant cells can be seen.
Shown here is an area of marked cellularity and extensive stromal overgrowth. Necrosis is also present.
Chang, M. Breast, Malignant phyllodes tumour. Digital Laboratory Medicine Library, Dept of Laboratory Medicine & Pathobiology, University of Toronto. Published
. Accessed December 17, 2025. https://dev.dlml.cflabs.ca/image/breast-malignant-phyllodes-tumour-lmp42180
