2026. Feasibility of De-escalated Radiotherapy in Breast Cancer Patients with a Complete Pathological Response to Neoadjuvant Systemic Therapy. Interim Analysis. Voprosy onkologii. 72, 3 (Jul. 2026), OF-2654. DOI:https://doi.org/10.37469/0507-3758-2026-72-3-OF-2654.