Fig. 2

Primary ILC of the breast in a 61-year-old female who presented with a left breast lump. a Mammogram of the left breast shows focal asymmetry in the inner left breast on CC view (arrowhead), which is not well seen on MLO view. This corresponds to the palpable lump. b Ultrasound of the lower inner left breast demonstrates a corresponding irregular hypoechoic 1.0 cm nodule with posterior acoustic shadowing. This was proven on biopsy to be invasive lobular carcinoma. c Subtracted CEDM of the left breast shows the known ILC is enhancing with spiculated margins (arrowheads), with a tiny adjacent nodule not seen on ultrasound. The tumor measured larger on CEDM (1.6 cm) than on ultrasound (1.0 cm). d Axial contrast-enhanced MRI image of the left breast shows the spiculated, enhancing ILC (arrow), similar in size compared with CEDM. No other suspicious nodules were seen in either breast on CEDM and MRI