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Posterior Acoustic Shadowing in Benign Breast Lesions

Sonographic-Pathologic Correlation

Departments of Radiology (S.P.W., E.F.C., S.L., C.S.) and Pathology (C.M., G.A.), University of Pennsylvania Medical Center, Philadelphia, Pennsylvania USA.

Address correspondence and reprint requests to Susan P. Weinstein, MD, Department of Radiology, University of Pennsylvania Medical Center, 1 Silverstein Building, 3400 Spruce St, Philadelphia, PA 19104-4283 USA. E-mail: weinstei{at}oasis.rad.upenn.edu.

Objective. To show a variety of benign breast lesions that exhibit posterior acoustic shadowing on sonography. Methods. The cases illustrate a variety of pathologic breast conditions that were collected at a referral breast center at a tertiary medical center. Results. A variety of pathologic conditions are discussed, with pathologic-imaging correlation. Conclusions. Although posterior acoustic shadowing is a sonographic feature that is most commonly associated with mammary malignancies, this sonographic finding may also be seen with benign breast lesions.

Key Words: breast • posterior acoustic shadowing • sonography

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