Short interval follow-up after a benign concordant MR-guided vacuum assisted breast biopsy – is it worthwhile?
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To determine the utility of short-interval follow-up after benign concordant MRI-guided breast biopsy.
Materials and methods
Institutional review board approved, retrospective review of consecutive biopsies performed over 3 years (2007–10) yielded 170 women with 188 lesions that were considered benign concordant. Indication for original study, biopsy results, follow-up recommendations, compliance and outcomes of subsequent MRI and mammography examinations were reviewed.
The most common indication for breast MRI was high-risk screening 119/170 (70 %). Overall, 59 % of lesions (113/188) had follow-up MRI. Of those lesions (n = 113), 43 % (49/113) presented within 7 months, 26 % (29/113) presented within 8–13 months, 11.5 % (13/113) presented within 14–22 months, and 19 % (22/113) presented after 23 months. At initial follow-up, 37 % of lesions were stable and 61 % were decreased in size. Three lesions were recommended for excision based on follow-up imaging with one malignancy diagnosed 2 years following biopsy. One additional patient had MRI-detected bilateral cancers remote from the biopsy site 3 years after biopsy.
Overall cancer yield of lesions with follow-up MRI was 0.9 % (1/113); no cancers were detected at 6 months. Our data suggests that 6-month follow-up may not be required and that annual screening MRI would be acceptable to maintain a reasonable cancer detection rate.
• Follow-up recommendations after benign concordant MRI-guided breast biopsy remain controversial.
• Cancer detection rate was 0.9 % overall with no cancers detected at 6 months.
• Short-interval follow-up after benign concordant MRI-guided breast biopsy may not be necessary.
KeywordsBenign Concordant MRI biopsy Breast Follow-up
The scientific guarantor of this publication is Linda Moy, MD. The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article. The authors state that this work has not received any funding. One of the authors has significant statistical expertise. Institutional review board approval was obtained. Written informed consent was waived by the institutional review board. Methodology: retrospective, observational, performed at one institution.
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