Mitotic count (No./10 HPF), expression count (No./10 HPF) of Cyclin A2, Cyclin B1, Cyclin E, and PHH3, labeling indices (%) of Ki-67 and Survivin, and a maximum diameter of each benign, borderline, or malignant phyllodes tumor. This evidence concerns the gene MKI67 and malignant phyllodes tumor.