Impact of risk-reducing mastectomy on quality of life of women with Li-Fraumeni syndrome.

Abstract

10623 Background: Risk-reducing mastectomy (RRM) is a common strategy for managing breast cancer (BC) risk in women with Li-Fraumeni syndrome (LFS). Data on uptake and health-related quality of life (HRQoL) in LFS are limited and often extrapolated from BRCA scenario, despite the lack of evidence on survival benefits in LFS. This study evaluated RRM uptake and its impact on HRQoL in women with LFS. Methods: TP53 PV female carriers from a Brazilian LFS cohort from January 2012 to December 2022 were eligible. After informed consent, 90 women reported oncological status, uptake of RRM, and completed BREAST-Q questionnaire. Scores were compared among different BC risk management strategies and minimal important difference (MID) of ≥ 4 was described. Multivariable analyses were performed to identify surgical factors related to HRQoL outcomes. Results: 71.7% (n=33) of women diagnosed with unilateral BC (n=46) underwent contralateral risk-reducing mastectomy (CRRM) at a median age of 39 years. Among unaffected BC women (n=44), 36.3% underwent bilateral risk-reducing mastectomy (BRRM) at a median age of 36 years. CRRM was associated with lower scores for psychosocial (64[±19] vs 93[±21], p=.05) and physical well-being (72[±16] vs 92[±18], p=.001). BRRM women had lower physical well-being scores (72[±19] vs 92[±13], p=.003). MID associated with worst HRQoL outcomes were seen in all four domains on CRRM women and on satisfaction with breasts and physical well-being of BRRM patients (table). Nipple-sparing mastectomy (NSM) presented better psychosocial (74[±20] vs 52[±19], p=.04) and sexual well-being (60[±20] vs 46[±20], p=.05) when compared to skin-sparing mastectomy (SSM) on CRRM patients and with higher sexual well-being (60[±20] vs 46[±20], p=.05) on BRRM patients. Women with BRRM > 2 years had better physical well-being (83[±14] vs 56 [±12], p<.001). There were no significant differences in scores of women with age £35 years at the time of BRRM, although MID ≥ 4 was observed on psychosocial and sexual well-being and satisfaction with breasts: -23.0, -14.4, and -20.0, respectively. Conclusions: We observed high rates of RRM in LFS women and those were associated with worse outcomes on breast HRQoL in comparison to surveillance. The potential benefits and harms of RRM should be carefully discussed with patients before performing it, especially in LFS women where the survival benefits of these interventions remain uncertain. [Table: see text]