Figure 4c. Images of a 38-year-old woman with T1cN1M0 breast carcinoma in the right breast. (a) Spot-compression magnification conventional mammogram demonstrates architectural distortion and segmentally distributed microcalcifications (arrows). (b) US scan demonstrates an irregular 1.4-cm mass (*). (c) Transverse PET mammography image demonstrates segmental increased FDG activity (arrows) that mirrors the mammographic abnormality. Histologic examination demonstrated a 1.6-cm invasive adenocarcinoma with extensive ductal carcinoma in situ.