These studies have also shown that only 40–71% of these examinations are given the suggested recommendation for short-interval follow-up. Previous studies have reported that up to 14% of screening and diagnostic mammography examinations are assigned BI-RADS category 3. Given the low probability of malignancy, discordance between probably benign assessments and short-interval follow-up recommendation can lead to unnecessary and costly workup for the majority of findings that are truly benign. Short-interval follow-up mammography monitors lesions for changes at a more frequent interval than regular screening and is intended to serve as an alternative to invasive procedures, such as biopsy or fine-needle aspiration. The lesions intended for a category 3 assessment are those believed to have an extremely low (< 2%) probability of being malignant. BI-RADS assessment category 3 (probably benign finding) is associated with a suggested recommendation for short-interval (< 1 year, usually 6 months) follow-up. The BI-RADS Atlas outlines seven assessment categories, each of which has an associated follow-up recommendation to guide radiologists and referring clinicians in the management of their patients. ![]() BI-RADS, which was developed by the American College of Radiology, outlines a standardized reporting system of mammographic lesions.
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