LBA12_PR – PERSEPHONE: 6 versus 12 months (m) of adjuvant trastuzumab in patients (pts) with HER2 positive (+) early breast cancer (EBC): cost effectiveness analysis results
Claire Hulme (Leeds, GB) and Peter Hall (Edinburgh, GB)
Adjuvant trastuzumab has significantly improved outcomes for HER2+ EBC, using the 12m (month) duration empirically adopted from pivotal registration trials. Given the annual per patient cost of trastuzumab treatment, a shorter duration has the potential to improve cost-effectiveness if efficacy is maintained. According to results from the PERSEPHONE trial, 6m of trastuzumab treatment was shown to be cost effective compared to 12m of trastuzumab treatment with no evidence of a detriment to quality of life.
185O_PR – Serum assessment of non-adherence to adjuvant endocrine therapy (ET) among premenopausal patients in the prospective multicenter CANTO cohort
Barbara Pistilli (Villejuif, FR)
Previous studies have demonstrated that younger patients (pts) with breast cancer (BC) are more likely to be non-adherent to adjuvant ET, leading to impaired prognosis. According to the results of this CANTO cohort study, at one year from initiation of TAM (tamoxifen), plasma measurements show that a substantial proportion of premenopausal pts are not adequately adherent to this treatment. Poorly-adherent pts could benefit from metabolic and pharmacogenetic investigations. Identification of pts at risk of non-adherence allows early targeted interventions to promote adherence in this unique population.
186O – Tumor-infiltrating lymphocytes (TILs) as an independent prognostic factor for early HER2+ breast cancer patients treated with adjuvant chemotherapy and trastuzumab in the randomized ShortHER trial
Maria Vittoria Dieci (Padova, IT)
TILs are an established prognostic factor for triple negative breast cancer and the ShortHER trial investigated the prognostic role of TILs for HER2+ early breast cancer patients. According to the trial results, TILs are an independent prognostic factor for HER2+ early breast cancer patients treated with adjuvant chemotherapy and trastuzumab. Integration of TILs in prognostic algorithms could help refine risk stratification and guide therapeutic de-escalation.