Hypofractionated radiotherapy after breast-conserving surgery: clinical and dosimetric factors predictive of acute skin toxicity

Raouia Ben Amor, Meriem Bohli , Zeineb Naimi et al.
Hypofractionated radiotherapy after breast-conserving surgery: clinical and dosimetric factors predictive of acute skin toxicity
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Purpose

 The purpose of this study was to evaluate acute skin toxicity in early breast cancer patients treated with hypofractionated radiotherapy (HFRT) after breast-conserving surgery and to identify factors predictive for grade ≥ 2 acute skin toxicity.

Materials and methods

 A monocentric retrospective study was carried out using cases treated between December 2017 and November 2020. We analyzed data from 202 patients with early breast cancer treated with 3D hypofractionated RT (40.05 Gy in 15 fractions) to the whole breast with or without regional lymph nodes, followed by 13.35 Gy in 5 fractions to the tumor bed. Acute skin toxicity was monitored during RT according to CTCAE (common toxicity criteria for adverse events) scale. Univariate and multivariate analyses were performed to assess predictive factors of acute skin toxicity.

Conclusion

 Our results confirm that whole breast with or without lymph nodes hypofractionated RT is safe and well tolerated. The factors strongly associated with a decreased risk of G2‑3 skin toxicity are T1, breast volume < 800 c, boost volume < 18 cc, and Dmax < 56 Gy. Long-term follow-up is needed to evaluate late toxicity.

Read the full article here: https://pubmed.ncbi.nlm.nih.gov/35943552/ 

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