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Fig. 4B —62-year-old postmenopausal woman not taking hormone
replacement therapy who underwent screening mammography. Screening mammogram
in extended craniocaudal (A) and mediolateral oblique (B) views
shows new focal asymmetric density (arrow) in left upper outer breast
compared with mammogram (not shown) obtained 3 years previously. It measures
approximately 2 cm, is low in x-ray attenuation, and has ill-defined margins.
Because it was new and has ill-defined margins, lesion is concerning for
malignancy, and biopsy was suggested. Results of needle localization and
surgical biopsy showed pseudoangiomatous stromal hyperplasia.