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Figure 5c. Images in a 43-year-old woman with bilateral masses due to sclerosing adenosis. (a, b) Palpable, circumscribed mass (indicated with a radiopaque marker) in the outer left breast containing a single coarse calcification (arrow) both at (a) mammography and (b) transverse sonography (10-MHz). The mass yielded sclerosing adenosis at 14-gauge sonographically guided core biopsy. (c) Mediolateral spot magnification mammogram reveals amorphous and punctate calcifications (arrowheads) within an indistinctly marginated mass in the right breast, which developed 5 years later. (d) Photomicrograph reveals focus of sclerosing adenosis with calcifications (arrowheads) at stereotactically guided 11-gauge biopsy, with associated fibrocystic changes. (Hematoxylin-eosin stain; original magnification, x20.)