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Life sciences · Interventional Study
ClinicalTrials.gov · October 22, 2026
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Interventional Study.
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Registry record from ClinicalTrials.gov (NCT06946238). This is a study registration, not published results. Lead sponsor: IRCCS San Raffaele. Recruitment status: RECRUITING. Phase: NA. Study type: INTERVENTIONAL. Enrollment: 311 participants (ESTIMATED). Conditions: Breast Cancer. Interventions: RADIATION: Adjuvant single-fraction accelerated partial breast irradiation. Primary outcome measures: Ipsilateral Breast Tumor Recurrence (IBTR) , 5 years. Brief summary: This is a prospective, randomized, monocentric, non-inferiority interventional clinical study comparing an Accelerated Partial Breast Irradiation (APBI) for the surgical bed of early-stage breast cancer patients with favorable histological subtypes, using stereotactic radiotherapy in a single dose of 15.5 Gy with Simultaneous Integrated Boost (SIB) to 21 Gy (study treatment, delivered in a single fraction) versus multifractionated radiotherapy of 30 Gy in 5 fractions (standard treatment, delivered in 5 fractions).