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Fig. 2. —52-year-old asymptomatic woman. Mediolateral oblique right mammogram shows linear and pleomorphic calcifications in segmental distribution spanning at least 5.0 cm at maximal diameter. Stereotactic 11-gauge directional vacuum-assisted biopsy was performed of two sites (arrows); both sites yielded ductal carcinoma in situ, but superior site also yielded microinvasion. Patient had one-stage mastectomy and axillary lymph node dissection, yielding infiltrating ductal carcinoma (0.3 cm), extensive ductal carcinoma in situ, and lymph nodes negative for metastasis.