Modifiable Post-Mastectomy Radiation Therapy Factors and Impact on Implant-Based Breast Reconstruction Outcomes

医学 放射治疗 乳房切除术 并发症 植入 乳房再造术 外科 养生 核医学 乳腺癌 内科学 癌症
作者
Laura L. Barnes,Jessica Chew,Melinda Lem,Catherine Park,Joanna C. Yang,Nicolas D. Prionas,Merisa Piper
出处
期刊:Plastic and Reconstructive Surgery [Ovid Technologies (Wolters Kluwer)]
卷期号:153 (5): 1000-1009 被引量:2
标识
DOI:10.1097/prs.0000000000010824
摘要

Background: Intensity-modulated radiation therapy and other modifiable radiation factors have been associated with decreased radiation toxicity. These factors could allow for improved reconstructive outcomes in patients requiring postmastectomy radiation therapy (PMRT). However, they have not yet been well studied in implant-based breast reconstruction. Methods: The authors performed a retrospective chart review of patients who underwent mastectomy with immediate tissue expander placement followed by PMRT. Radiation characteristics were collected, including radiation technique, bolus regimen, x-ray energy, fractionation, maximum radiation hot spot, and tissue volume receiving more than 105% or more than 107% of the prescription dose. Reconstructive complications occurring after initiation of PMRT were analyzed with respect to these radiation characteristics. Results: Sixty-eight patients (70 breasts) were included in this study. The overall complication rate was 28.6%, with infection being the most common complication (24.3%), requiring removal of the tissue expander or implant in greater than half of infections (15.7%). Maximum radiation hot spot was greater in patients who required explantation after PMRT, and this approached statistical significance (114.5% ± 7.2% versus 111.4% ± 4.4%; P = 0.059). Tissue volume receiving more than 105% and 107% were also greater in patients who required explantation after PMRT (42.1% ± 17.1% versus 33.0% ± 20.9% and 16.4% ± 14.5% versus 11.3% ± 14.6%, respectively); however, this was not statistically significant ( P = 0.176 and P = 0.313, respectively). There were no significant differences in complication rates between patients with respect to radiation technique or other radiation characteristics studied. Conclusion: Minimizing the radiation hot spots and volumes of tissue receiving greater than the prescription dose of radiation may improve reconstructive outcomes in patients undergoing implant-based breast reconstruction followed by PMRT. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, III.
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