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Images in a 72-year-old woman with right breast ductal carcinoma in situ who underwent successful wide local excision after greater extent of disease was seen on MRI scans. (A) Maximum intensity projection and (B) first postcontrast axial T1-weighted subtraction images show segmental nonmass enhancement (oval outline) measuring 100 mm in the upper outer quadrant. Span of disease measured 48 mm at mammography.
