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Conventional B-mode US (A) revealed 5-mm round, hypoechoic mass with microlobulated margin in right breast (arrow). Breast imaging reporting and data assessment of B-mode US categorized it as 4a. SWE parameters were as follows: Emax, 18.1 kPa; Eratio, 2.08 (B); and SMIVI, 0% (C). US-guided core needle biopsy and subsequent surgical excision confirmed this lesion as invasive ductal carcinoma.
