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A physical examination was used to screen for breast cancer in 1,500 women with biopsy-proven adenocarcinoma of the breast and in 3,000 age- and race-matched control women. The results of the physical examination were positive (ie, a mass was palpated) in 1235 cases and in 450 control women, all of whom showed no evidence of cancer at biopsy. The specificity of this exam is: 82% 27% 85% 3796
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