Fig. 8.
Malignant appearing spindle cell lesion of the breast with no distinguishing features (A) and CK negative. However, further sampling revealed areas with squamous cell carcinoma component (B) confirming the diagnosis of MBC. C shows a case of malignant appearing spindle cell lesion that is negative for CK and CD34. However, further sampling revealed areas with the biphasic growth pattern and characteristic parenchymal component (D) confirming the diagnosis of phyllodes tumour