Atypical breast hyperplasia is a precancerous lesion with a high risk of invasive carcinoma. The atypical character of hyperplasia is confirmed by the absence of anti Ck5/6 immuno-marking in the immunohistochemical study. These lesions are difficult to identify on breast ultrasound. Magnetic reasoning imaging shows nonmass enhancement which can have focal or regional distribution. We report the case of a 53-year-old woman, with a history of infiltrating lobular carcinoma of the right breast

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... ted, in which the senological findings were in favor of atypical ductal hyperplasia of the left breast.