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Ultrasonographic (US) images of left breast cancer. (A) On comparison of transverse images of the left breast (left: initial; right: follow-up), US images reveal a benign looking ovoid nodule in the initial and follow-up images (arrows) and a new heterogenous hypoechoic area in the follow-up image (arrowheads). (B) Transverse US image shows a heterogenous hypoechoic area in the left upper outer breast (arrows).
