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Figure 2a. Current screening mammogram obtained in a 74-year-old woman. (a) Craniocaudal and (b) mediolateral oblique views show a subtle 1.5-cm area of architectural distortion and asymmetric density (arrow) in the posterior central portion of the left breast, seen best in a. (c) Low-resolution digitized images with CAD markers (_*). Architectural distortion is identified in both views and was histologically related to ILC. An extra mark (arrow) is seen in the lateral left breast in the craniocaudal view only (left images). No major abnormality was found by the interpreting radiologist in this area. (d) Digitally magnified images (craniocaudal on the left, mediolateral oblique on the right) confirm parenchymal distortion (arrows) at the 12-o'clock position.