The management of women with ductal carcinoma in situ of the breast in Australia and New Zealand between 2007 and 2016

Background The incidence of detected ductal carcinoma in situ (DCIS) continues to increase and now accounts for 14% all breast cancer, 20%-25% screen-detected cases. Treatment trends DCIS are important order inform the ongoing debate about possible overdiagnosis overtreatment, but have not been investigated over a decade Australia New Zealand. Against this background, we aimed describe temporal management Australian Zealander women. Methods Using BreastSurgANZ Quality Audit (BQA) database, conducted descriptive study Zealand from 2007 2016. We assessed frequency surgical treatments, adjuvant therapies, axillary surgery women with pure DCIS. Results There were 17 883 cases 2007-2016 recorded BQA database. treatment patterns consistent no changes time. most common was breast-conserving (66%), followed by mastectomy (37%), 36% received sentinel node biopsy (SNB). Conclusion clinical diagnosed Zealand, appears stable A substantial proportion receive SNB aspect care warrants further exploration determine whether it represents appropriate care. These results, alongside outcomes trials on DCIS, will help if any best practice required.