Long term results of a phase II trial of hypofractionated adjuvant radiotherapy for early-stage breast cancer with volumetric modulated arc therapy and simultaneous integrated boost

被引：21

作者：

Franceschini, D. ^{[1
]}

Fogliata, A. ^{[1
]}

Spoto, R. ^{[1
]}

Dominici, L. ^{[1
]}

Lo Faro, L. ^{[1
]}

Franzese, C. ^{[1
,2
]}

Comito, T. ^{[1
]}

Lobefalo, F. ^{[1
]}

Reggiori, G. ^{[1
]}

Cozzi, L. ^{[1
,2
]}

Sagona, A. ^{[3
]}

Gentile, D. ^{[2
,3
]}

Scorsetti, M. ^{[1
,2
]}

机构：

[1] IRCCS Humanitas Res Hosp, Dept Radiotherapy & Radiosurg, Milan, Italy

[2] Humanitas Univ, Dept Biomed Sci, Milan, Italy

[3] IRCCS Humanitas Res Hosp, Breast Unit, Milan, Italy

来源：

RADIOTHERAPY AND ONCOLOGY | 2021年 / 164卷

关键词：

Early-stage breast cancer; Simultaneous integrated boost; SIB; Hypofractionation; VMAT; Late toxicity; RADIATION-THERAPY; UK STANDARDIZATION; CONTRALATERAL BREAST; CONSERVING SURGERY; FOLLOW-UP; IRRADIATION; RISK; WOMEN; IMRT;

D O I：

10.1016/j.radonc.2021.09.006

中图分类号：

R73 [肿瘤学];

学科分类号：

100214 ;

摘要：

Purpose: to report toxicity and cosmetic outcome with a median follow-up of 6 years of a phase II trial of hypofractionated radiotherapy with volumetric modulated arc therapy (VMAT) and simultaneous integrated boost (SIB) for early-stage breast cancer after conservative surgery. Materials and methods: From August 2010 to September 2014, patients requiring adjuvant radiotherapy for early-stage breast cancer were treated according to a phase I-II protocol with SIB to 40.5 and 48 Gy to the breast and the boost region, respectively, with VMAT technique. The primary endpoint evaluated the treatment feasibility regarding adherence to required dose constraints for target, heart and lungs. Acute and late toxicity, local and distant control were secondary endpoints. Results: 450 patients were included in the trial and analysed after a median follow-up of 6 years. Acute toxicity was already presented in a previous paper. Regarding late toxicity, 93% of patients had no skin alteration at five years, while 5.3% and 1.3% did record G1 and G2 residual toxicity, respectively. Cosmetic outcome was scored good or excellent in almost all cases (97.2%), fair only in 2.3% of patients. Residual tenderness in the irradiated breast was reported by 10% of patients. Cosmesis and breast pain improved during follow-up. Two cases of G2 pneumonitis and two cases of ischemic cardiopathy were registered during follow-up. Five cases presented local recurrence in the homolateral breast, four patients had a new primary cancer in the contralateral breast, while distant metastasis developed in 7 patients. Conclusion: After more than six years, hypofractionated VMAT with SIB for adjuvant radiotherapy in early-stage breast cancer patients remains a safe and effective approach. Mature data on skin toxicity and cosmetic outcome are encouraging. However, longer follow-up is required to evaluate local control, cardiac toxicity and secondary carcinogenesis. (c) 2021 Elsevier B.V. All rights reserved. Radiotherapy and Oncology 164 (2021) 50-56

引用

页码：50 / 56

页数：7

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