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Craniocaudal images of Patient 21, hyalinized fibroadenoma. (a) Mammogram acquired before contrast-enhanced digital mammography procedure, the solid arrow indicates the lesion, and open arrow signals a region of normal glandular tissue; (b, c) subtracted images at 1 and 4 min after the start of contrast medium (CM) injection. The subtracted images show no uptake of CM at the lesion region.
