“…1,2,9,10,14 In our series, posterior shadowing was noted in 20 (25%) of the 79 benign lesions, including 6 (27%) of 22 fibroadenomas. In the literature, distal shadowing has been reported in 17-29% of benign lesions of all types 6,10 and in 6-11% of fibroadenomas. 2,8,15 Marked hypoechogenicity, a feature suspicious for malignancy, was present in only 27 (30%) of the 91 carcinomas with unequivocal echogenic findings, compared with the 69% and 64% in prior reports.…”