First clinical report of helical tomotherapy with simultaneous integrated boost for synchronous bilateral breast cancer.

Objective: Radiotherapy (RT) for synchronous bilateral breast cancer (SBBC) is technically very challenging. This study reports the clinical feasibility, dosimetry and safety of helical tomotherapy (HT) with simultaneous integrated boost (SIB) in patients treated with adjuvant radiotherapy for SBBC.

Methods: 21 women with SBBC treated with HT from January 2013 to June 2016 were retrospectively evaluated.