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Radiation Pneumonitis in Association with Internal Mammary Node Irradiation in Breast Cancer Patients: An Ancillary Result from the KROG 08-06 Study

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Author(s)
Jinhyun Choi, Yong Bae Kim, Kyung Hwan ShinSung-Ja AhnHyung-Sik LeeWon ParkSu Ssan KimJin Hee KimKyu Chan LeeDong Won KimHyun Suk SuhKyung Ran ParkHyun Soo ShinChang-Ok Suh
Keimyung Author(s)
Kim, Jin Hee
Department
Dept. of Radiation Oncology (방사선종양학)
Journal Title
Journal of Breast Cancer
Issued Date
2016
Volume
19
Issue
3
Keyword
Breast neoplasmsLymphatic irradiationRadiation pneumonitis
Abstract
Purpose : The aim of this study is to present the incidence of radiation pneumonitis (RP) reported within 6 months after treatment for breast cancer with or without internal mammary node irradiation (IMNI).
Methods : In the Korean Radiation Oncology Group (KROG) 08-06 phase III randomized trial, patients who were node-positive after surgery were randomly assigned to receive radiotherapy either with or without IMNI. A total of 747 patients were enrolled, and three-dimensional treatment planning with computed tomography simulation was performed for all patients. Of the 747 patients, 722 underwent chest X-rays before and within 6 months after radiotherapy. These 722 patients underwent evaluation, and RP was diagnosed on the basis of chest radiography findings and clinical symptoms. The relationship between the incidence of RP and clinical/dosimetric parameters was analyzed.
Results : RP developed in 35 patients (4.8%), including grade 1 RP in 26 patients (3.6%), grade 2 RP in nine patients (1.2%); there was no incidence of grade 3 or higher RP. Grade 2 RP cases were observed in only the IMNI group. The risk of developing RP was influenced by IMNI treatment; pneumonitis occurred in 6.5% of patients (n=23/356) who underwent IMNI and in 3.3% of patients (n=12/366) who did not (p=0.047). The differences in lung dosimetric parameters (mean lung dose, V10–40) were statistically significant between the two groups.
Conclusion : IMNI treatment resulted in increased radiation exposure to the lung and a higher rate of RP, but the incidence and severity of RP was minimal and acceptable. This minor impact on morbidity should be balanced with the impact on survival outcome in future analyses.
Keimyung Author(s)(Kor)
김진희
Publisher
School of Medicine
Citation
Jinhyun Choi, Yong Bae Kim, Kyung Hwan Shin et al. (2016). Radiation Pneumonitis in Association with Internal Mammary Node Irradiation in Breast Cancer Patients: An Ancillary Result from the KROG 08-06 Study. Journal of Breast Cancer, 19(3), 275–282. doi: 10.4048/jbc.2016.19.3.275
Type
Article
ISSN
1738-6756
DOI
10.4048/jbc.2016.19.3.275
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/32442
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Radiation Oncology (방사선종양학)
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