{"title":"缩短辅助光子照射时间以减轻水肿(SAPHIRE)的主要结果分析:低分次区域结节照射 (RNI) 与常规分次区域结节照射 (RNI) 的随机 III 期试验","authors":"","doi":"10.1016/j.ijrobp.2024.07.007","DOIUrl":null,"url":null,"abstract":"<div><h3>Purpose/Objective(s)</h3><div>Although RNI improves breast cancer survival, it increases risk of upper extremity lymphedema. We hypothesized that hypofractionated RNI may reduce lymphedema risk.</div></div><div><h3>Materials/Methods</h3><div>Patients with a recommendation for RNI for cT0-T3, N0-N2a, N3a invasive breast cancer were randomized between standard RNI (STD-RNI: 50 Gy to breast/chest wall and 45 Gy to RN) or shorter RNI (SH-RNI: 40.05 Gy to breast/chest wall and 37.5 Gy to RN). Patients were stratified by receipt of chemotherapy, body mass index (BMI), type of axillary surgery, and difference in arm volume prior to RNI. RN targets included the internal mammary, infraclavicular, and supraclavicular nodal basins; the level I and II axilla was treated if axillary lymph node dissection was not performed. Boost to the tumor bed or chest wall was permitted. Lymphedema was assessed via standard toxicity grading by the treating physician and by serial perometry measurement prior to surgery, post-operatively and then 6, 12, 18, and 24 months after radiation. The primary outcome was defined as a ≥ 10% relative difference in arm volume on at least one post-radiation perometry assessment, normalized by the pre-operative perometry measurement. Secondary outcomes included comparison of physician-reported toxicities using the NCI CTCAE version 4.0 scale graded weekly during RT, at 6 months, and then annually. Fisher’s exact tests compared groups. Local-regional recurrence (LRR) was calculated using the Kaplan-Meier method and compared using the log-rank test.</div></div><div><h3>Results</h3><div>There were three hundred twenty-four patients across 5 treatment centers were enrolled and randomized from 2017 to 2022 with median follow up of 4.75 years. Clinical-pathologic covariates were well-balanced by treatment arm. Median age was 54 years, 64% were non-Hispanic White, and 39% had body mass index (BMI) > 30. 57% underwent mastectomy with or without reconstruction and 42% underwent segmental mastectomy. Sixty-eight percent underwent axillary lymph node dissection and 90% received chemotherapy. Perometry-assessed lymphedema, the primary outcome, was less common after SH-RNI (29%) than STD-RNI (36%), but the difference was not statistically significant (<em>P</em> = 0.24). In contrast, physician-assessed lymphedema was significantly less common with SH-RNI than STD-RNI (15% vs. 27%, <em>P</em> = 0.009). Patients randomized to SH-RNI were less likely to experience any grade ≥ 2 toxicity (52% vs. 78%, <em>P</em> < 0.001). Pneumonitis was uncommon and similar between groups (3% vs 2%, <em>P</em> = 0.46). There were no brachial plexopathy events. Five-year LRR risk was 3% with SH-RNI and 2% with STD-RNI (<em>P</em> = 0.48).</div></div><div><h3>Conclusion</h3><div>In this primary outcome analysis of a multisite phase III randomized clinical trial, SH-RNI did not lower risk of perometry-assessed lymphedema. However, SH-RNI conferred a low risk of LRR and reduced the risk of physician-reported lymphedema and grade 2 or higher toxicity when compared to STD-RNI.</div></div>","PeriodicalId":14215,"journal":{"name":"International Journal of Radiation Oncology Biology Physics","volume":null,"pages":null},"PeriodicalIF":6.4000,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Primary Outcome Analysis for Shortening Adjuvant Photon Irradiation to Reduce Edema (SAPHIRE): A Randomized, Phase III Trial of Hypo- vs. Conventionally Fractionated Regional Nodal Irradiation (RNI)\",\"authors\":\"\",\"doi\":\"10.1016/j.ijrobp.2024.07.007\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Purpose/Objective(s)</h3><div>Although RNI improves breast cancer survival, it increases risk of upper extremity lymphedema. We hypothesized that hypofractionated RNI may reduce lymphedema risk.</div></div><div><h3>Materials/Methods</h3><div>Patients with a recommendation for RNI for cT0-T3, N0-N2a, N3a invasive breast cancer were randomized between standard RNI (STD-RNI: 50 Gy to breast/chest wall and 45 Gy to RN) or shorter RNI (SH-RNI: 40.05 Gy to breast/chest wall and 37.5 Gy to RN). Patients were stratified by receipt of chemotherapy, body mass index (BMI), type of axillary surgery, and difference in arm volume prior to RNI. RN targets included the internal mammary, infraclavicular, and supraclavicular nodal basins; the level I and II axilla was treated if axillary lymph node dissection was not performed. Boost to the tumor bed or chest wall was permitted. Lymphedema was assessed via standard toxicity grading by the treating physician and by serial perometry measurement prior to surgery, post-operatively and then 6, 12, 18, and 24 months after radiation. The primary outcome was defined as a ≥ 10% relative difference in arm volume on at least one post-radiation perometry assessment, normalized by the pre-operative perometry measurement. Secondary outcomes included comparison of physician-reported toxicities using the NCI CTCAE version 4.0 scale graded weekly during RT, at 6 months, and then annually. Fisher’s exact tests compared groups. Local-regional recurrence (LRR) was calculated using the Kaplan-Meier method and compared using the log-rank test.</div></div><div><h3>Results</h3><div>There were three hundred twenty-four patients across 5 treatment centers were enrolled and randomized from 2017 to 2022 with median follow up of 4.75 years. Clinical-pathologic covariates were well-balanced by treatment arm. Median age was 54 years, 64% were non-Hispanic White, and 39% had body mass index (BMI) > 30. 57% underwent mastectomy with or without reconstruction and 42% underwent segmental mastectomy. Sixty-eight percent underwent axillary lymph node dissection and 90% received chemotherapy. Perometry-assessed lymphedema, the primary outcome, was less common after SH-RNI (29%) than STD-RNI (36%), but the difference was not statistically significant (<em>P</em> = 0.24). In contrast, physician-assessed lymphedema was significantly less common with SH-RNI than STD-RNI (15% vs. 27%, <em>P</em> = 0.009). Patients randomized to SH-RNI were less likely to experience any grade ≥ 2 toxicity (52% vs. 78%, <em>P</em> < 0.001). Pneumonitis was uncommon and similar between groups (3% vs 2%, <em>P</em> = 0.46). There were no brachial plexopathy events. Five-year LRR risk was 3% with SH-RNI and 2% with STD-RNI (<em>P</em> = 0.48).</div></div><div><h3>Conclusion</h3><div>In this primary outcome analysis of a multisite phase III randomized clinical trial, SH-RNI did not lower risk of perometry-assessed lymphedema. However, SH-RNI conferred a low risk of LRR and reduced the risk of physician-reported lymphedema and grade 2 or higher toxicity when compared to STD-RNI.</div></div>\",\"PeriodicalId\":14215,\"journal\":{\"name\":\"International Journal of Radiation Oncology Biology Physics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":6.4000,\"publicationDate\":\"2024-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Radiation Oncology Biology Physics\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0360301624007697\",\"RegionNum\":1,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ONCOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Radiation Oncology Biology Physics","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0360301624007697","RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ONCOLOGY","Score":null,"Total":0}
Primary Outcome Analysis for Shortening Adjuvant Photon Irradiation to Reduce Edema (SAPHIRE): A Randomized, Phase III Trial of Hypo- vs. Conventionally Fractionated Regional Nodal Irradiation (RNI)
Purpose/Objective(s)
Although RNI improves breast cancer survival, it increases risk of upper extremity lymphedema. We hypothesized that hypofractionated RNI may reduce lymphedema risk.
Materials/Methods
Patients with a recommendation for RNI for cT0-T3, N0-N2a, N3a invasive breast cancer were randomized between standard RNI (STD-RNI: 50 Gy to breast/chest wall and 45 Gy to RN) or shorter RNI (SH-RNI: 40.05 Gy to breast/chest wall and 37.5 Gy to RN). Patients were stratified by receipt of chemotherapy, body mass index (BMI), type of axillary surgery, and difference in arm volume prior to RNI. RN targets included the internal mammary, infraclavicular, and supraclavicular nodal basins; the level I and II axilla was treated if axillary lymph node dissection was not performed. Boost to the tumor bed or chest wall was permitted. Lymphedema was assessed via standard toxicity grading by the treating physician and by serial perometry measurement prior to surgery, post-operatively and then 6, 12, 18, and 24 months after radiation. The primary outcome was defined as a ≥ 10% relative difference in arm volume on at least one post-radiation perometry assessment, normalized by the pre-operative perometry measurement. Secondary outcomes included comparison of physician-reported toxicities using the NCI CTCAE version 4.0 scale graded weekly during RT, at 6 months, and then annually. Fisher’s exact tests compared groups. Local-regional recurrence (LRR) was calculated using the Kaplan-Meier method and compared using the log-rank test.
Results
There were three hundred twenty-four patients across 5 treatment centers were enrolled and randomized from 2017 to 2022 with median follow up of 4.75 years. Clinical-pathologic covariates were well-balanced by treatment arm. Median age was 54 years, 64% were non-Hispanic White, and 39% had body mass index (BMI) > 30. 57% underwent mastectomy with or without reconstruction and 42% underwent segmental mastectomy. Sixty-eight percent underwent axillary lymph node dissection and 90% received chemotherapy. Perometry-assessed lymphedema, the primary outcome, was less common after SH-RNI (29%) than STD-RNI (36%), but the difference was not statistically significant (P = 0.24). In contrast, physician-assessed lymphedema was significantly less common with SH-RNI than STD-RNI (15% vs. 27%, P = 0.009). Patients randomized to SH-RNI were less likely to experience any grade ≥ 2 toxicity (52% vs. 78%, P < 0.001). Pneumonitis was uncommon and similar between groups (3% vs 2%, P = 0.46). There were no brachial plexopathy events. Five-year LRR risk was 3% with SH-RNI and 2% with STD-RNI (P = 0.48).
Conclusion
In this primary outcome analysis of a multisite phase III randomized clinical trial, SH-RNI did not lower risk of perometry-assessed lymphedema. However, SH-RNI conferred a low risk of LRR and reduced the risk of physician-reported lymphedema and grade 2 or higher toxicity when compared to STD-RNI.
期刊介绍:
International Journal of Radiation Oncology • Biology • Physics (IJROBP), known in the field as the Red Journal, publishes original laboratory and clinical investigations related to radiation oncology, radiation biology, medical physics, and both education and health policy as it relates to the field.
This journal has a particular interest in original contributions of the following types: prospective clinical trials, outcomes research, and large database interrogation. In addition, it seeks reports of high-impact innovations in single or combined modality treatment, tumor sensitization, normal tissue protection (including both precision avoidance and pharmacologic means), brachytherapy, particle irradiation, and cancer imaging. Technical advances related to dosimetry and conformal radiation treatment planning are of interest, as are basic science studies investigating tumor physiology and the molecular biology underlying cancer and normal tissue radiation response.