B3 Lesions of Breast: Two Year Retrospective Analysis of 4478 Cases Carried out in a Single Centre in the UK

Background: B3 category mainly consists of lesions that provide benign histology on core biopsy, but either are known to show heterogeneity or have increased risk associated malignancy. However, the level is very different for entities. All cases should be looked atypia. The objective this study compare various in two audits, calculate median rate and upgrade rates (the at which they turn into malignancy subsequent excision) them with national standards published literature. aims see whether vacuum assisted excision surgical has been done such lesions. Methods: This a retrospective encompasses audits 2017-18 2020-21 Queen's hospital, Barking, Havering Redbridge NHS trust. A total 4478 were reviewed 206 graded as biopsy. Results: Overall, 113 93 giving 5% overall 12%. Intraductal papilloma was most commonly seen lesion both audits. Also, 31 underwent 62 excision, 38 not undergoing further excision. Conclusion: within 'preferred rate'- 4.5-8.5% comparable (16.57%) those National Breast Cancer screening audit, 2016-2019. type line criteria stated by Royal College Pathologists. excised did follow-up.