Figure 11: A 47-year-old female who presented with a palpable lump in her left breast (a) Mediolateral oblique mammogram shows an irregular large mass in the left upper breast (arrow). (b) Transverse gray-scale image shows an irregular hypoechoic mass (double lined arrows) with internal anechoic cystic components (thin arrows) and posterior acoustic enhancement (short thick arrows). (c) Sagittal fat suppressed subtracted post-contrast T1-weighted MR image shows irregular peripheral rim enhancing large mass in the left breast. (d) Photomicrograph (H and E, high-power magnification) shows abnormal cells with increased cytoplasm, cells undergoing mitosis (arrows), and larger pleomorphic cells (short thick arrow). Final histopathologic diagnosis was metaplastic carcinoma, squamous subtype which often correlates with metaplastic carcinoma containing more cystic components.