Abstract
For simultaneous bilateral breast cancer (SBBC) treatment, conventional radiotherapy (RT) has a number of critical shortcomings. Thus, the usefulness of volumetric arc therapy (VMAT) for SBBC is undeniable. A 34-year-old woman with SBBC received neoadjuvant chemotherapy followed by breast-conserving surgery and bilateral lymph node dissection. Given the conservative surgery and the nodal involvement after neoadjuvant chemotherapy, bilateral adjuvant RT to the breasts and regional nodes with doses of 50 Gy in 25 fractions and a simultaneous integrated boost (SIB) of 60 Gy to the surgical bed was proposed. Monoisocentric VMAT using 2 pairs of arcs was performed with adequate target dose coverage and low doses to the organs at risk. The results of this case were compared with those of previous studies in terms of RT technique and irradiated volumes. VMAT is feasible and safe in the treatment of SBBC with SIB and nodal irradiation.
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