A some around 55 years old female presented with a breast mass. Mastectomy specimen received for pathologic evaluation.
Malignant phyllodes tumor with heterologous component, aneurysmal bone cyst-like changes and osteoclast-type giant cells Histopathology: Cellular neoplasm composing of pleomorphic epithelioid to spindle-like stromal cells with marked nuclear pleomorphism, vesicular nuclei, prominent nucleoli, and focal areas of necrosis. Leaf-like patterns of phyllodes tumor with benign duct epithelium are seen, which are pushed by underlying sheets…