Evaluating the use of vacuum‐assisted excisions in the management of B3 breast lesions.

Objective: To evaluate the use of vacuum‐assisted excisions (VAEs) in the management of B3 lesions within a single UK breast care centre. Assessment was made by determining the upgrade rates of the different B3 lesions at VAE. Methods and Materials: The study population comprised all patients who had a B3 result and subsequently underwent a VAE between November 2016 and October 2021. Patients with ipsilateral cancers were excluded. Retrospective biopsy and VAE results were reviewed. Upgrade rates and confidence intervals were calculated, and statistical significance was tested to determine any differences between upgrade rates of the B3 groups. Results: 480 VAEs for B3 lesions were performed, with 10 excluded. Overall upgrade rate was 5%. 87.5% of upgrades were to non‐invasive disease. Atypical intraductal epithelial proliferation (AIDEP) had a 15% upgrade rate, significantly different to lobular neoplasia (2%), papilloma without atypia (0%), and radial scar without atypia (0%). 10% of B3 lesions with atypia were upgraded, significantly different to 0% of B3 lesions without atypia. B3 lesions diagnosed by vacuum‐assisted biopsy (VAB) had a significantly higher upgrade rate of 8% compared with 2% for lesions diagnosed by core biopsy (CBX), although this result was impacted by high numbers of AIDEP diagnosed by VAB. Conclusions: The results suggest using VAE for the management of AIDEP is appropriate. However, they also indicate that by performing VAEs of papillomas and radial scars without atypia, overtreatment may be occurring. Advances in knowledge: This study adds to the ongoing discussion on the best treatment of B3 breast lesions. [ABSTRACT FROM AUTHOR]