Cancer Research and Treatment

Original Articles

Gastrointestinal cancer

The Clinical Efficacy of Colorectal Cancer Patients with Pulmonary Oligometastases by Sterotactic Body Ablative Radiotherapy: A Meta-Analysis: Jae-Uk Jeong, Chai Hong Rim, Gyu Sang Yoo, Won Kyung Cho, Eui Kyu Chie, Yong Chan Ahn, Jong Hoon Lee, on behalf of Korean Oligometastasis Working Group, Korean Cancer Association; Cancer Res Treat. 2024;56(3):809-824. Published online December 14, 2023; DOI: https://doi.org/10.4143/crt.2023.920

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Purpose
There is increasing interest in the efficacy of stereotactic ablative radiotherapy (SABR) for treating colorectal cancer (CRC) patients with oligometastases (OM), recently. The purpose of this meta-analysis was to evaluate local control (LC), progression-free survival (PFS), and overall survival (OS) of CRC patients with pulmonary OM treated with SABR and toxicities.
Materials and Methods
Studies that reported SABR for CRC patients with pulmonary OM were searched from MEDLINE and Embase. Treatment outcomes including LC, PFS, OS, and toxicities of grade 3 or higher were assessed.
Results
A total of 19 studies with 1,668 patients were chosen for this meta-analysis. Pooled 1-, 2-, and 3-year LC rates were 83.1%, 69.3%, and 63.9%, respectively. PFS rates were 44.8%, 26.5%, and 21.5% at 1, 2, and 3 years, respectively. OS rates at 1-, 2-, and 3-year were 87.5%, 69.9%, and 60.5%, respectively. The toxicity rate of grade 3 or higher was 3.6%. The effect of dose escalation was meta-analyzed using available studies.
Conclusion
Application of SABR to CRC patients with pulmonary OM achieved modest local control with acceptable toxicity according to the present meta-analysis. Further studies establishing the clinical efficacy of SABR are guaranteed.

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Identifying Trends in Oncology Research through a Bibliographic Analysis of Cancer Research and Treatment
Choong-kun Lee, Jeong Min Choo, Yong Chan Ahn, Jin Kim, Sun Young Rha, Chai Hong Rim
Cancer Research and Treatment.2025; 57(1): 11. CrossRef

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Differential Perspectives by Specialty on Oligometastatic Colorectal Cancer: A Korean Oligometastasis Working Group’s Comparative Survey Study: Won Kyung Cho, Gyu Sang Yoo, Chai Hong Rim, Jae-Uk Jeong, Eui Kyu Chie, Yong Chan Ahn, Hyeon-Min Cho, Jun Won Um, Yang-Gun Suh, Ah Ram Chang, Jong Hoon Lee, On behalf of the Oligometastasis Working Group, Korean Cancer Association; Cancer Res Treat. 2023;55(4):1281-1290. Published online June 7, 2023; DOI: https://doi.org/10.4143/crt.2023.479

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Purpose
Despite numerous studies on the optimal treatments for oligometastatic disease (OMD), there is no established interdisciplinary consensus on its diagnosis or classification. This survey-based study aimed to analyze the differential opinions of colorectal surgeons and radiation oncologists regarding the definition and treatment of OMD from the colorectal primary.
Materials and Methods
A total of 141 participants were included in this study, consisting of 63 radiation oncologists (44.7%) and 78 colorectal surgeons (55.3%). The survey consisted of 19 questions related to OMD, and the responses were analyzed using the chi-square test to determine statistical differences between the specialties.
Results
The radiation oncologists chose “bone” more frequently compared to the colorectal surgeons (19.2% vs. 36.5%, p=0.022), while colorectal surgeons favored “peritoneal seeding” (26.9% vs. 9.5%, p=0.009). Regarding the number of metastatic tumors, 48.3% of colorectal surgeons responded that “irrelevant, if all metastatic lesions are amendable to local therapy”, while only 21.8% of radiation oncologist chose same answer. When asked about molecular diagnosis, most surgeons (74.8%) said it was important, but only 35.8% of radiation oncologists agreed.
Conclusion
This study demonstrates that although radiation oncologists and colorectal surgeons agreed on a majority of aspects such as diagnostic imaging, biomarker, systemic therapy, and optimal timing of OMD, they also had quite different perspectives on several aspects of OMD. Understanding these differences is crucial to achieving multidisciplinary consensus on the definition and optimal management of OMD.

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Barriers in Oligometastasis Care in Korea: Radiation Oncologists’ Perspectives
Eui Kyu Chie, Chai Hong Rim, Won Kyung Cho, Yong Chan Ahn
Cancer Research and Treatment.2023; 55(4): 1063. CrossRef

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Review Article

Metastasis-Directed Local Therapy of Hepatic Oligometastasis from Colorectal Cancer and Future Perspective in Radiation Therapy: Gyu Sang Yoo, Chai Hong Rim, Won Kyung Cho, Jae-Uk Jeong, Eui Kyu Chie, Hyeon-Min Cho, Jun Won Um, Yong Chan Ahn, Jong Hoon Lee, on behalf of Korean Cancer Association Oligometastasis Working Group; Cancer Res Treat. 2023;55(3):707-719. Published online March 15, 2023; DOI: https://doi.org/10.4143/crt.2022.1599

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Introduction of the concept for oligometastasis led to wide application of metastasis-directed local ablative therapies for metastatic colorectal cancer (CRC). By application of the metastasis-directed local ablative therapies including surgical resection, radiofrequency ablation (RFA), and stereotactic ablative body radiotherapy (SABR), the survival outcomes of patients with metastatic CRC have improved. The liver is the most common distant metastatic site in CRC patients, and recently various metastasis-directed local therapies for hepatic oligometastasis from CRC (HOCRC) are widely used. Surgical resection is the first line of metastatic-directed local therapy for HOCRC, but its eligibility is very limited. Alternatively, RFA can be applied to patients who are ineligible for surgical resection of liver metastasis. However, there are some limitations such as inferior local control (LC) compared with surgical resection and technical feasibility based on location, size, and visibility on ultrasonography of the liver metastasis. Recent advances in radiation therapy technology have led to an increase in the use of SABR for liver tumors. SABR is considered complementary to RFA for patients with HOCRC who are ineligible for RFA. Furthermore, SABR can potentially result in better LC for liver metastases > 2-3 cm compared with RFA. In this article, the previous studies regarding curative metastasis-directed local therapies for HOCRC based on the radiation oncologist’s and surgeon’s perspective are reviewed and discussed. In addition, future perspectives regarding SABR in the treatment of HOCRC are suggested.

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Identifying Trends in Oncology Research through a Bibliographic Analysis of Cancer Research and Treatment
Choong-kun Lee, Jeong Min Choo, Yong Chan Ahn, Jin Kim, Sun Young Rha, Chai Hong Rim
Cancer Research and Treatment.2025; 57(1): 11. CrossRef
Evidence-based clinical recommendations for hypofractionated radiotherapy: exploring efficacy and safety - Part 4: Liver and locally recurrent rectal cancer
Hwa Kyung Byun, Gyu Sang Yoo, Soo-Yoon Sung, Jin-Ho Song, Byoung Hyuck Kim, Yoo-Kang Kwak, Yeon Joo Kim, Yeon-Sil Kim, Kyung Su Kim
Radiation Oncology Journal.2024; 42(4): 247. CrossRef

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Original Article

Pediatric cancer

Chronological Analysis of Acute Hematological Outcomes after Proton and Photon Beam Craniospinal Irradiation in Pediatric Brain Tumors: Gyu Sang Yoo, Jeong Il Yu, Sungkoo Cho, Youngyih Han, Yoonjin Oh, Do Hoon Lim, Hee Rim Nam, Ji-Won Lee, Ki-Woong Sung, Hyung Jin Shin; Cancer Res Treat. 2022;54(3):907-916. Published online October 15, 2021; DOI: https://doi.org/10.4143/crt.2021.332

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Purpose
This study aimed to compare the early hematological dynamics and acute toxicities between proton beam craniospinal irradiation (PrCSI) and photon beam craniospinal irradiation (PhCSI) for pediatric brain tumors.
Materials and Methods
We retrospectively reviewed patients with pediatric brain tumors who received craniospinal irradiation (CSI). The average change in hemoglobin levels (ΔHb_avg), absolute lymphocyte counts (ΔALC_avg), and platelet counts (ΔPLT_avg) from baseline values was evaluated and compared between the PrCSI and PhCSI groups at 1 and 2 weeks after the initiation of CSI, 1 week before and at the end of radiotherapy, and 3-4 weeks after the completion of radiotherapy using t test and mixed-model analysis.
Results
The PrCSI and PhCSI groups consisted of 36 and 30 patients, respectively. There were no significant differences in ΔHb_avg between the two groups at any timepoint. However, ΔALC_avg and ΔPLT_avg were significantly lower in the PhCSI group than in PrCSI group at every timepoint, demonstrating that PrCSI resulted in a significantly lower rate of decline and better recovery of absolute lymphocyte and platelet counts. The rate of grade 3 acute anemia was significantly lower in the PrCSI group than in in the PhCSI group.
Conclusion
PrCSI showed a lower rate of decline and better recovery of absolute lymphocyte and platelet counts than PhCSI in the CSI for pediatric brain tumors. Grade 3 acute anemia was significantly less frequent in the PrCSI group than in the PhCSI group. Further large-scale studies are warranted to confirm these results.

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Justin Oh, Samir Patel, Mary-Pat Schlosser, Andrew J. Arifin, Carol Oliveira, Anne-Marie Charpentier, Derek S. Tsang
Current Oncology.2025; 32(3): 180. CrossRef
Acute side effects of proton and photon radiotherapy for medulloblastoma: a retrospective national multicenter study
Linn Söderlund Diaz, Måns Agrup, Anna Askild, Anna Embring, Jacob Engellau, Ingrid Fagerström Kristensen, Anna Flejmer, Charlotta Fröjd, Martin P Nilsson, Anna Maja Svärd, Angelica Walfridsson, Malin Blomstrand
Journal of Neuro-Oncology.2025;[Epub] CrossRef
Long-term effects of local radiotherapy on growth and vertebral features in children with high-risk neuroblastoma
Kyungmi Yang, Joong Hyun Ahn, Sook-Young Woo, Sang Hoon Jung, Ki Woong Sung, Ji Won Lee, Do Hoon Lim
BMC Pediatrics.2024;[Epub] CrossRef
Comparison of Craniospinal Irradiation Using Proton Beams According to Irradiation Method and Initial Experience Treating Pediatric Patients
Nobuyoshi Fukumitsu, Hikaru Kubota, Masayuki Mima, Yusuke Demizu, Takeshi Suzuki, Daiichiro Hasegawa, Yoshiyuki Kosaka, Atsufumi Kawamura, Toshinori Soejima
Advances in Radiation Oncology.2023; 8(5): 101251. CrossRef
Proton versus photon radiation therapy: A clinical review
Zhe Chen, Michael M. Dominello, Michael C. Joiner, Jay W. Burmeister
Frontiers in Oncology.2023;[Epub] CrossRef
Shifting Strategies in the Treatment of Pediatric Craniopharyngioma
Segev Gabay, Thomas E. Merchant, Frederick A. Boop, Jonathan Roth, Shlomi Constantini
Current Oncology Reports.2023; 25(12): 1497. CrossRef

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Special Article

Physical and Biological Characteristics of Particle Therapy for Oncologists: Hwa Kyung Byun, Min Cheol Han, Kyungmi Yang, Jin Sung Kim, Gyu Sang Yoo, Woong Sub Koom, Yong Bae Kim; Cancer Res Treat. 2021;53(3):611-620. Published online June 16, 2021; DOI: https://doi.org/10.4143/crt.2021.066

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Particle therapy is a promising and evolving modality of radiotherapy that can be used to treat tumors that are radioresistant to conventional photon beam radiotherapy. It has unique biological and physical advantages compared with conventional radiotherapy. The characteristic feature of particle therapy is the “Bragg peak,” a steep and localized peak of dose, that enables precise delivery of the radiation dose to the tumor while effectively sparing normal organs. Especially, the charged particles (e.g., proton, helium, carbon) cause a high rate of energy loss along the track, thereby leading to high biological effectiveness, which makes particle therapy attractive. Using this property, the particle beam induces more severe DNA double-strand breaks than the photon beam, which is less influenced by the oxygen level. This review describes the general biological and physical aspects of particle therapy for oncologists, including non-radiation oncologists and beginners in the field.

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Original Articles

General

Patterns of Proton Beam Therapy Use in Clinical Practice between 2007 and 2019 in Korea: Sung Uk Lee, Kyungmi Yang, Sung Ho Moon, Yang-Gun Suh, Gyu Sang Yoo; Cancer Res Treat. 2021;53(4):935-943. Published online May 17, 2021; DOI: https://doi.org/10.4143/crt.2021.409

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Purpose
Proton beam therapy (PBT) is a state-of-the-art technology employed in radiotherapy (RT) for cancer patients. This study characterized how PBT has been used in clinical practice in Korea.
Materials and Methods
Patients who received any type of RT between 2007 and 2019 were identified from the radiation oncology registry of the two PBT facilities operating in Korea (National Cancer Center and Samsung Medical Center). The chi-square test was used to identify patient- and treatment-related characteristics associated with the receipt of PBT.
Results
A total of 54,035 patients had been treated with some form of RT in the two institutions, of whom 5,398 received PBT (10.0%). The number of patients who receive PBT has gradually increased since PBT first started, from 162 patients in 2007 to 1,304 patients in 2019. Among all types of cancer, PBT use in liver cancer has been steadily increasing from 20% in 2008-2009 to 32% in 2018-2019. In contrast, that in prostate cancer has been continuously decreasing from 20% in 2008-2009 to < 10% in 2018-2019. Male sex, very young or old age, stage I-II disease, residency in non-capital areas, a definitive setting, a curative treatment aim, enrollment in a clinical trial, re-irradiation and insurance coverage were significantly associated with the receipt of PBT (all p < 0.05).
Conclusion
Since PBT started in Korea, the number of patients receiving PBT has increased to more than 1,000 per year and treatment indications have expanded. Liver cancer is the most common primary tumor among all PBT cases in Korea.

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“Particle therapy - future for the Baltic states?” – synthesis of the expert workshop report
Kristaps Paļskis, Erika Korobeinikova, Dace Bogorada-Saukuma, Anna Maria Camarda, Rebecca Taylor, Elena Benedetto, Edgars Mamis, Maija Radziņa, Andrejs Ērglis, Diana Adliene, Manjit Dosanjh, Maurizio Vretenar, Toms Torims
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Kamila Bała, Yana Samovich, Karolina Dorobisz
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PTCOG international survey of practice patterns and trends in utilization of proton therapy for breast cancer
J. Isabelle Choi, Camille Hardy-Abeloos, Alicia Lozano, Alexandra Hanlon, Carlos Vargas, John H. Maduro, Julie Bradley, Birgitte Offersen, Bruce Haffty, Mark Pankuch, Richard Amos, Nalee Kim, Shannon M. MacDonald, Youlia Kirova, Robert W. Mutter
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Kyungmi Yang, Jeong Eun Lee, Won Park, Yong Chan Ahn, Seung Jae Huh
Japanese Journal of Clinical Oncology.2023; 53(12): 1177. CrossRef

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Genitourinary cancer

Risk Factors and Patterns of Locoregional Recurrence after Radical Nephrectomy for Locally Advanced Renal Cell Carcinoma: Gyu Sang Yoo, Won Park, Hongryull Pyo, Byong Chang Jeong, Hwang Gyun Jeon, Minyong Kang, Seong Il Seo, Seong Soo Jeon, Hyun Moo Lee, Han Yong Choi, Byung Kwan Park, Chan Kyo Kim, Sung Yoon Park, Ghee Young Kwon; Cancer Res Treat. 2022;54(1):218-225. Published online April 15, 2021; DOI: https://doi.org/10.4143/crt.2020.1373

Abstract PDF Supplementary Material PubReader ePub

Purpose
We aimed to investigate the risk factors and patterns of locoregional recurrence (LRR) after radical nephrectomy (RN) in patients with locally advanced renal cell carcinoma (RCC).
Materials and Methods
We retrospectively analyzed 245 patients who underwent RN for non-metastatic pT3-4 RCC from January 2006 to January 2016. We analyzed the risk factors associated with poor locoregional control using Cox regression. Anatomical mapping was performed on reference computed tomography scans showing intact kidneys.
Results
The median follow-up duration was 56 months (range, 1 to 128 months). Tumor extension to renal vessels or the inferior vena cava (IVC) and Fuhrman’s nuclear grade IV were identified as independent risk factors of LRR. The 5-year actuarial LRR rates in groups with no risk factor, one risk factor, and two risk factors were 2.3%, 19.8%, and 30.8%, respectively (p < 0.001). The locations of LRR were distributed as follows: aortocaval area (n=2), paraaortic area (n=4), retrocaval area (n=5), and tumor bed (n=11). No LRR was observed above the celiac axis (CA) or under the inferior mesenteric artery (IMA).
Conclusion
Tumor extension to renal vessels or the IVC and Fuhrman’s nuclear grade IV were the independent risk factors associated with LRR after RN for pT3-4 RCC. The locations of LRR after RN for RCC were distributed in the tumor bed and regional lymphatic area from the bifurcation of the CA to that of the IMA.

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Survival pattern of metastatic renal cell carcinoma patients according to WHO/ISUP grade: a long-term multi-institutional study
Joongwon Choi, Seokhwan Bang, Jungyo Suh, Chang Il Choi, Wan Song, Hyeong Dong Yuk, Chan Ho Lee, Minyong Kang, Seol Ho Choo, Jung Kwon Kim, Hyung Ho Lee, Jung Ki Jo, Eu Chang Hwang, Chang Wook Jeong, Young Hwii Ko, Jae Young Park, Cheryn Song, Seong Il Se
Scientific Reports.2024;[Epub] CrossRef
Adjuvant Therapy for High-Risk Localized Renal Cell Carcinoma: Current Landscape and Future Direction
Dylan M Buller, Maria Antony, Benjamin T Ristau
OncoTargets and Therapy.2023; Volume 16: 49. CrossRef

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Carcinoembryonic Antigen Improves the Performance of Magnetic Resonance Imaging in the Prediction of Pathologic Response after Neoadjuvant Chemoradiation for Patients with Rectal Cancer: Gyu Sang Yoo, Hee Chul Park, Jeong Il Yu, Doo Ho Choi, Won Kyung Cho, Young Suk Park, Joon Oh Park, Ho Yeong Lim, Won Ki Kang, Woo Yong Lee, Hee Cheol Kim, Seong Hyeon Yun, Yong Beom Cho, Yoon Ah Park, Kyoung Doo Song, Seok-Hyung Kim, Sang Yun Ha; Cancer Res Treat. 2020;52(2):446-454. Published online September 25, 2019; DOI: https://doi.org/10.4143/crt.2019.261

Abstract PDF Supplementary Material PubReader ePub

Purpose
The purpose of this study was to investigate the role of carcinoembryonic antigen (CEA) levels in improving the performance of magnetic resonance imaging (MRI) for the prediction of pathologic response after the neoadjuvant chemoradiation (NCRT) for patients with rectal cancer.
Materials and Methods
We retrospectively reviewed the medical records of 524 rectal cancer patients who underwent NCRT and total mesorectal excision between January 2009 and December 2014. The performances of MRI with or without CEA parameters (initial CEA and CEA dynamics) for prediction of pathologic tumor response grade (pTRG) were compared by receiver-operating characteristic analysis with DeLong’s method. Cox regression was used to identify the independent factors associated to pTRG and disease-free survival (DFS) after NCRT.
Results
The median follow-up was 64.0 months (range, 3.0 to 113.0 months). On multivariate analysis, poor tumor regression grade on MRI (mrTRG; p < 0.001), initial CEA (p < 0.001) and the mesorectal fascia involvement on MRI before NCRT (mrMFI; p=0.054) showed association with poor pTRG. The mrTRG plus CEA parameters showed significantly improved performances in the prediction of pTRG than mrTRG alone. All of mrTRG, mrMFI, and initial CEA were also identified as independent factors associated with DFS. The initial CEA further discriminated DFS in the subgroups with good mrTRG or that without mrMFI.
Conclusion
The CEA parameters significantly improved the performance of MRI in the prediction of pTRG after NCRT for patients with rectal cancer. The DFS was further discriminated by initial CEA level in the groups with favorable MRI parameters.

Citations

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Clinical outcomes of neoadjuvant chemoradiotherapy followed by total mesorectal excision in locally advanced rectal cancer with mesorectal fascia involvement
Jeong Ha Lee, Nalee Kim, Jeong Il Yu, Gyu Sang Yoo, Hee Chul Park, Woo-Yong Lee, Seong Hyeon Yun, Hee Cheol Kim, Yong Beom Cho, Jung Wook Huh, Yoon Ah Park, Jung Kyong Shin, Joon Oh Park, Seung Tae Kim, Young Suk Park, Jeeyun Lee, Won Ki Kang
Radiation Oncology Journal.2024; 42(2): 130. CrossRef
Predicting the response to neoadjuvant chemoradiation for rectal cancer using nomograms based on MRI tumour regression grade
S. Qin, Y. Chen, K. Liu, Y. Li, Y. Zhou, W. Zhao, P. Xin, Q. Wang, S. Lu, H. Wang, N. Lang
Cancer/Radiothérapie.2024; 28(4): 341. CrossRef
Body composition parameters combined with blood biomarkers and magnetic resonance imaging predict responses to neoadjuvant chemoradiotherapy in locally advanced rectal cancer
Jianguo Yang, Qican Deng, Zhenzhou Chen, Yajun Chen, Zhongxue Fu
Frontiers in Oncology.2023;[Epub] CrossRef
Pretreatment blood biomarkers combined with magnetic resonance imaging predict responses to neoadjuvant chemoradiotherapy in locally advanced rectal cancer
Xinyu Shi, Min Zhao, Bo Shi, Guoliang Chen, Huihui Yao, Junjie Chen, Daiwei Wan, Wen Gu, Songbing He
Frontiers in Oncology.2022;[Epub] CrossRef
Clinical implication and management of rectal cancer with clinically suspicious lateral pelvic lymph node metastasis: A radiation oncologist’s perspective
Gyu Sang Yoo, Hee Chul Park, Jeong Il Yu
Frontiers in Oncology.2022;[Epub] CrossRef
High-Resolution T2-Weighted MRI to Evaluate Rectal Cancer: Why Variations Matter
Kirsten L Gormly
Korean Journal of Radiology.2021; 22(9): 1475. CrossRef
MRI Assessment of Complete Response to Preoperative Chemoradiation Therapy for Rectal Cancer: 2020 Guide for Practice from the Korean Society of Abdominal Radiology
Seong Ho Park, Seung Hyun Cho, Sang Hyun Choi, Jong Keon Jang, Min Ju Kim, Seung Ho Kim, Joon Seok Lim, Sung Kyoung Moon, Ji Hoon Park, Nieun Seo
Korean Journal of Radiology.2020; 21(7): 812. CrossRef

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Comparison of Breast Conserving Surgery Followed by Radiation Therapy with Mastectomy Alone for Pathologic N1 Breast Cancer Patients in the Era of Anthracycline Plus Taxane-Based Chemotherapy: A Multicenter Retrospective Study (KROG 1418): Gyu Sang Yoo, Won Park, Jeong Il Yu, Doo Ho Choi, Yeon-Joo Kim, Kyung Hwan Shin, Chan Woo Wee, Kyubo Kim, Kyung Ran Park, Yong Bae Kim, Sung Ja Ahn, Jong Hoon Lee, Jin Hee Kim, Mison Chun, Hyung-Sik Lee, Jung Soo Kim, Jihye Cha; Cancer Res Treat. 2019;51(3):1041-1051. Published online November 1, 2018; DOI: https://doi.org/10.4143/crt.2018.424

Abstract PDF PubReader ePub

Purpose
We compared the oncologic outcomes of breast-conserving surgery plus radiation therapy (BCS+RT) and modified radical mastectomy (MRM) under anthracycline plus taxane-based (AT) regimens and investigated the role of adjuvant radiation therapy (RT) in patients with pathologic N1 (pN1) breast cancer treated by mastectomy.
Materials and Methods
We retrospectively reviewed the medical records of 2,011 patients with pN1 breast cancer who underwent BCS+RT or MRM alone at 12 institutions between January 2006 and December 2010. Two-to-one propensity score matching was performed for balances in variables between the groups.
Results
The median follow-up duration for the total cohort was 69 months (range, 1 to 114 months). After propensity score matching, 1,074 patients (676 in the BCS+RT group and 398 in the MRM-alone group) were analyzed finally. The overall survival, disease-free survival, locoregional failure-free survival, and regional failure-free survival (RFFS) curves of the BCS+RT group vs. MRM-alone group were not significantly different. The subgroup analysis revealed that in the group with both lymphovascular invasion (LVI) and histologic grade (HG) III, the BCS+RT showed significantly superior RFFS (p=0.008). Lymphedema (p=0.007) and radiation pneumonitis (p=0.031) occurred more frequently in the BCS+RT group than in the MRM-alone group, significantly.
Conclusion
There are no differences in oncologic outcomes between BCS+RT and MRM-alone groups under the AT chemotherapy regimens for pN1 breast cancer. However, BCS+RT group showed superior RFFS to MRM-alone group in the patients with LVI and HG III. Adjuvant RT might be considerable for pN1 breast cancer patients with LVI and HG III.

Citations

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Investigation of the clinical benefits of regular breath-holding training utilizing surface guided radiation therapy technology for patients with left breast cancer
Hongming Li, Zheng Miao, Jie Shen, Jianing Xiao, Zhiwei Yang, Wei Tian, Xiansong Sun, Zhen Zhou, Jing Shen, Jie Qiu
Journal of Radiation Research and Applied Sciences.2025; 18(2): 101393. CrossRef
21-gene recurrence score in predicting the outcome of postoperative radiotherapy in T1-2N1 luminal breast cancer after breast-conserving surgery
Shang-Jin Xie, Run-Jie Wang, San-Gang Wu, Fu-Xing Zhang
The Breast.2024; 74: 103679. CrossRef
Assessing Radiation Effects on Chemo-Treated BT20 and 4T1 Breast Cancer, and Neuroblastoma Cell Lines: A Study of Single and Multiple-Cell Ionization via Infrared Laser Trapping
Mulugeta S. Goangul, Daniel B. Erenso, Ying Gao, Li Chen, Kwame O. Eshun, Gisela Alvarez, Horace T. Crogman
Radiation.2024; 4(1): 85. CrossRef
Overall survival after mastectomy versus breast-conserving surgery with adjuvant radiotherapy for early-stage breast cancer: meta-analysis
Kiran K Rajan, Katherine Fairhurst, Beth Birkbeck, Shonnelly Novintan, Rebecca Wilson, Jelena Savović, Chris Holcombe, Shelley Potter
BJS Open.2024;[Epub] CrossRef
Radiotherapy dosimetry and radiotherapy related complications of immediate implant-based reconstruction after breast cancer surgery
Yu Zhang, Fuxiu Ye, Yun Teng, Jin Zheng, Chunlu Li, Ruilan Ma, Haichen Zhang
Frontiers in Oncology.2023;[Epub] CrossRef
Does Breast-Conserving Surgery with Radiotherapy have a Better Survival than Mastectomy? A Meta-Analysis of More than 1,500,000 Patients
Gabriel De la Cruz Ku, Manish Karamchandani, Diego Chambergo-Michilot, Alexis R. Narvaez-Rojas, Michael Jonczyk, Fortunato S. Príncipe-Meneses, David Posawatz, Salvatore Nardello, Abhishek Chatterjee
Annals of Surgical Oncology.2022; 29(10): 6163. CrossRef
Protocol for the postoperative radiotherapy in N1 breast cancer patients (PORT-N1) trial, a prospective multicenter, randomized, controlled, non-inferiority trial of patients receiving breast-conserving surgery or mastectomy
Tae Hoon Lee, Ji Hyun Chang, Bum-Sup Jang, Jae Sik Kim, Tae Hyun Kim, Won Park, Yong Bae Kim, Su Ssan Kim, Wonshik Han, Han-Byoel Lee, Kyung Hwan Shin
BMC Cancer.2022;[Epub] CrossRef
Risk factors to identify the indication for regional nodal irradiation in T1-2N1M0 breast cancer: A joint analysis of 4,243 real-world cases from two institutions
Guang-Yi Sun, Ge Wen, Yu-Jing Zhang, Yu Tang, Hao Jing, Hui Fang, Jian-Yang Wang, Jiang-Hu Zhang, Xu-Ran Zhao, Si-Ye Chen, Yong-Wen Song, Jing Jin, Yue-Ping Liu, Yuan Tang, Shu-Nan Qi, Ning Li, Bo Chen, Ning-Ning Lu, Ye-Xiong Li, Shu-Lian Wang
Frontiers in Oncology.2022;[Epub] CrossRef
Chemo-treated 4T1 breast cancer cells radiation response measured by single and multiple cell ionization using infrared laser trap
Endris Muhammed, Li Chen, Ying Gao, Daniel Erenso
Scientific Reports.2019;[Epub] CrossRef

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