PT - JOURNAL ARTICLE AU - KYUBO KIM AU - MINSOO CHUN AU - HYEONGMIN JIN AU - WONGUEN JUNG AU - KYUNG HWAN SHIN AU - SEONG SOO SHIN AU - YEON JOO KIM AU - SHIN-HYUNG PARK AU - JIN HEE KIM AU - YONG HO KIM AU - HYUN SOO SHIN AU - HAEYOUNG KIM AU - SU SSAN KIM AU - JONG HOON LEE AU - YONG BAE KIM AU - SUN YOUNG LEE AU - JINHYUN CHOI AU - DO HOON OH AU - KI MUN KANG AU - JEANNY KWON AU - MI YOUNG KIM AU - TAERYOOL KOO AU - HAE JIN PARK AU - SUNG JA AHN TI - Inter-institutional Variation in Intensity-modulated Radiotherapy for Breast Cancer in Korea (KROG 19-01) AID - 10.21873/anticanres.15100 DP - 2021 Jun 01 TA - Anticancer Research PG - 3145--3152 VI - 41 IP - 6 4099 - http://ar.iiarjournals.org/content/41/6/3145.short 4100 - http://ar.iiarjournals.org/content/41/6/3145.full SO - Anticancer Res2021 Jun 01; 41 AB - Background/Aim: To present the variations in the target delineation and the planning results of intensity-modulated radiation therapy (IMRT) for breast cancers. Patients and Methods: We requested the target volumes and organs at risk delineation for two cases of left breast cancers, and evaluated the IMRT plans including the supraclavicular and internal mammary node irradiation. Results: Twenty-one institutions participated in this study. Differences in the planning target volume among institutions reached up to three-times for breast-conserving surgery (BCS) case and five-times for mastectomy case. Mean heart doses ranged from 3.3 to 24.1 Gy for BCS case and from 5.0 to 26.5 Gy for mastectomy case. Ipsilateral lung volumes receiving more than 20 Gy ranged from 4.7 to 57.4% for BCS case and from 16.4 to 55.5% for mastectomy case. Conclusion: There were large variations in the target delineation and planning results of IMRT for breast cancers among institutions. Considering the increased use of breast IMRT, more standardized protocols are needed.