Figure 3a. Circumscribed mass due to fibroadenoma and pleomorphic calcifications due to ductal carcinoma in situ in a 71-year-old woman. (a) Craniocaudal mammogram shows multiple circumscribed masses, one of which has popcorn calcification (arrow) typical of fibroadenoma. The circumscribed mass (*) was consistently described as circumscribed and benign or as probably benign. (b) Four-fold photographic magnification of mass (*) and adjacent calcifications (arrow). A majority of participants and all experienced breast imagers recognized the mass as circumscribed or partially obscured and as benign or probably benign (55% before and 74% after training). The calcifications and mass were considered separately. The calcifications were variably described as punctate and probably benign or as pleomorphic and suggestive of malignancy, even with training.