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Sonograms of a 46-year-old woman demonstrate an irregular-shaped, heterogeneously hypoechoic nodule with angular and branching margin. Internal microcalcifications (arrows) are seen within the nodule. Real-time compound imaging (B) is the best technique for evaluation of the margin and internal echotexture, compared to conventional (A) and pluse-inversion harmonic imaging (B). Pathologic examination indicated the presence of invasive ductal carcinoma.
