THE IMPACT OF EUSOMA ACCREDITATION ON BREAT CACER PATIENTS MANAGEMENT IN A SINGLE ITALIAN CENTER ambrogio.londero@gmail.com

PW04-02

THE IMPACT OF EUSOMA ACCREDITATION ON BREAT CACER PATIENTS MANAGEMENT IN A SINGLE ITALIAN CENTER

7

Italy

Oral or Poster

Since management within specialized centers with high throughput has been shown to have a positive impact on the outcomes of oncology patients, the European Society of Breast Cancer Specialists (EUSOMA) has drawn up a series of guidelines that breast units must comply to obtain accreditation. We evaluated the trend of EUSOMA quality indicators (QI) over the years and their impact on patient outcomes.

We collected retrospective data on all breast cancer (BC) patients diagnosed between January 2016 and December 2023. We evaluated QI compliance over time using RUN charts and interrupted time series analyses.

Patients with DCIS <2cm and invasive BC <3cm who underwent breast conserving surgery rose after accreditation from 79% to 83% and from 50% to 72%, respectively. Patients with DCIS who received a single operation increased from 79% before accreditation (2016-2019) to 83% after (2020-2023). The prevalence of benign pathology decreased from 22% to 13%. Sentinel node biopsy for DCIS undergoing conserving surgery was avoided in 80% and 89%, before and after accreditation respectively. Immediate breast reconstruction, if post-mastectomy radiotherapy (PMRT) was not required, increased from 48% to 52% and, if PMRT was needed, from 20% to 22%.

Our data show a progressively better compliance with the EUSOMA QI with the request for accreditation. The attempt to meet EUSOMA QI essentially reduced the surgical impact both at the breast and the axilla for intraductal or small invasive carcinomas, as well as then number of reinterventions due to inadequate margins, and encouraged immediate reconstruction after mastectomy.