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Fig. 7. —53-year-old woman with fibroadenoma shown on spot magnification mammogram. Variability was great with this patient. On initial interpretation, two observers considered this a focal asymmetric density (one as highly suspicious of malignancy [BI-RADS category 5], and one as probably benign [BI-RADS category 3]). Another three observers considered this an indistinct mass and suspicious (n = 2, BI-RADS category 4) or highly suggestive (n = 1, BI-RADS category 5) of malignancy. Three observers described associated pleomorphic calcifications. On second interpretation, all observers changed their description. Two observers considered mass circumscribed and lobulated; one considered it obscured; one, spiculated; and one, microlobulated. Final assessment changed for one observer who initially classified the mass as indistinct and highly suggestive of malignancy (BI-RADS category 5,) then reclassified it as circumscribed and benign (BI-RADS category 2).

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