Key result
Right-sided 3D-CRT for breast cancer exposes the SAN to >1 Gy, necessitating improved radiotherapy techniques.
Why the study?
Can the radiation dose to larger cardiac structures serve as an accurate surrogate for the dose to the sinoatrial and atrioventricular nodes in breast cancer patients treated with 3D-CRT?
Can the radiation dose to larger cardiac structures serve as an accurate surrogate for the dose to the sinoatrial and atrioventricular nodes in breast cancer patients treated with 3D-CRT?
In breast cancer patients treated with 3D-CRT, right-sided irradiation exposes the sinoatrial node to >1 Gy in most patients, and while the right atrium dose is a good surrogate for SAN exposure, specific delineation of conduction nodes remains necessary for accurate AVN dosimetry.
Answers are grounded in this paper and cite their sources.
May warrant SAN contouring and technique refinement in right-sided breast 3D-CRT; hypothesis-generating for arrhythmia risk with node-specific dosimetry.
In BC patients treated 10 years ago with 3D-CRT, SAN and AVN exposure was moderate but could exceed 1 Gy to the SAN in many right-sided patients with no IMN-inclusion. The RA appeared as an interesting surrogate for SAN exposure. Specific conduction nodes delineation remains necessary by using modern radiotherapy techniques.
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Errahmani et al. (2022) studied this question. In breast cancer patients treated with 3D-CRT, SAN exposure exceeded 1 Gy in many right-sided cases without IMN-inclusion, indicating a need for improved radiotherapy techniques.
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