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Fig. 7B. —60-year-old woman with vaguely palpable density at 12-o'clock position that was biopsied and revealed infiltrating lobular carcinoma. MR imaging was performed to assess disease extent. Subtracted sagittal enhanced three-dimensional T1-weighted FSPGR MR image (TR/TE, 17/2.4; flip angle, 35°) shows additional suspicious mammographically occult irregular mass in upper outer quadrant (arrow). Directed sonography (not shown) showed lesion at 12-o'clock position but not upper outer quadrant lesion. MR imaging—guided needle localization (not shown) revealed infiltrating lobular carcinoma at both sites, with tumor extending to margins.