Figure 5b: (a) Mediolateral oblique mammogram in 52-year-old patient demonstrates oval, well-circumscribed, equal-density mass (arrow) in superior left breast. (b) Sonogram in same patient demonstrates oval, hypoechoic solid mass (arrow) with circumscribed margins, parallel orientation, and posterior acoustic shadowing. Histopathologic results indicated benign fibroadenoma. Both LDA and radiologist correctly considered this lesion very benign, with scores of 0.02 of 1.00 and 0 of 100, respectively.