Sonographic detection of hematomas and fluid after imaging guided core breast biopsy

We investigated sonographic changes to the breast after imaging guided core breast biopsy. We studied 31 breast lesions in 29 patients before, immediately after, and 2 to 9 days after core biopsy looking for hematomas. We found sonographic changes to the breast consistent with fluid collections after core biopsy in seven of 31 breast lesions (23%). Of the biopsy sites with sonographic changes, evidence suggested that six of 31 (19%) likely had hematomas. Sonographic changes after core breast biopsy are common and the formation rate of suspected hematomas is greater than previously believed although generally not clinically significant.