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Figure 1a. Images in a 44-year-old woman with a left breast mass that was discovered at screening mammography. (a) US image obtained before VAB in the radial plane shows a lobulated solid lesion (arrows) of 0.9 cm in mean diameter. All US evidence of the lesion was removed during VAB; the histologic diagnosis was fibroadenoma. (b) Follow-up US image obtained in the radial plane 6 months after biopsy shows a crescentic residual mass (arrows) measuring 0.4 cm in mean diameter that was obscured during the VAB procedure.