Breast Imaging Reporting and Data System

(BIRADS) classification has been developed for both ultrasound and mammography.[1] ‘BIRADS 2 lesions are described as benign findings inclu ding intramammary nodes and breast implants. BIRADS 3 lesions are probably benign lesions including non calcified circumscribed lesions.’[2] Lesions classified as BIRADS 3 and 4 require 6 months ’ followup and core biopsy, respectively,[2] the latter providing histological confirmation and a definitive diagnosis. For all palpable solid masses that are circumscribed and not calcified, some authors continue to recommend a tissue diagnosis even when the features indicate that the mass is probably benign.[3] This point is controversial, however, and more data are required to determine whether the alternative of shortterm follow up can replace biopsy in these patients.[3] Patients in our breast imaging unit with benignappearing