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  • Title: External accelerated partial breast irradiation for ductal carcinoma in situ: long-term follow-up from a phase 3 randomized trial.
    Author: Becherini C, Meattini I, Livi L, Garlatti P, Desideri I, Scotti V, Orzalesi L, Sanchez LJ, Bernini M, Casella D, Nesi S, Nori J, Bianchi S, Pallotta S, Marrazzo L.
    Journal: Tumori; 2019 Jun; 105(3):205-209. PubMed ID: 30474504.
    Abstract:
    INTRODUCTION: For a long time, accelerated partial breast irradiation (APBI) effectiveness for ductal carcinoma in situ (DCIS) has been debated, due to conflicting published results. Recent encouraging data from phase 3 trials reopened new perspectives for this radiation approach. The aim of the present study was to analyze the long-term efficacy and safety results of the series of patients with DCIS enrolled in the APBI arm of the APBI-IMRT-Florence phase 3 trial (NCT02104895). METHODS: Patients were treated in a phase 3 randomized trial comparing whole breast irradiation (50 Gy in 25 fractions to the whole breast, plus 10 Gy in 5 fractions to the tumor bed) to APBI (30 Gy in 5 nonconsecutive fractions) using the intensity-modulated radiotherapy technique. RESULTS: Overall, 22 patients were treated in the APBI arm. Median age was 62 years (mean 59; range 42-75 years). At a median follow-up of 9.2 years (mean 8.8; range 3.8-12.1 years), no contralateral invasive/DCIS occurrence, distant metastasis, or breast cancer-related death were recorded. The 5- and 10-year local recurrence, distant metastasis-free survival, and breast cancer-specific survival were 100%. The 10-year overall survival rate was 90.9%. No late toxicity at 5 and 10 years was recorded. CONCLUSIONS: Waiting for pending studies and mature follow-up, we confirmed the efficacy and safety of APBI for low-risk DCIS.
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