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Sonograms of a 52-year-old woman show a well-defined, hypoechoic, round nodule with internal microcalcifications. Posterior shadowing (arrows) due to microcalcifications is more clearly visualized at pulse-inversion harmonic imaging (C) than conventional (A) and real-time compound imaging (B). Pathologic examination indicated the presence of degenerating fibroadenoma.
