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Rim CH, Cho WK, Park S, Yoon WS, Yang DS. Role of local ablative treatment in oligometastatic non-small cell lung cancer: a meta-analysis. Int J Surg 2023; 109:1006-1014. [PMID: 36974686 PMCID: PMC10389458 DOI: 10.1097/js9.0000000000000339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 03/06/2023] [Indexed: 03/29/2023]
Abstract
INTRODUCTION This meta-analysis analyzed the oncologic role of local ablative treatment (LAT) in oligometastatic nonsmall cell lung cancer. METHOD Pubmed, MEDLINE, Embase, and Cochrane Library were searched until October, 2022. Studies comparing LAT with standard care (control) were included. Sensitivity analyses were performed including randomized controlled studies (RCTs). Subgroup analyses were performed according to specific categories and metastatic burden. The primary endpoints were overall survival (OS) and progression-free survival (PFS). Considering the median OS and PFS from landmark studies, 2-year OS and 1-year PFS rates were used to calculate pooled odds ratios (ORs). RESULTS A total of 20 studies (four RCTs) encompassing 1750 patients were included. Surgery and radiotherapy (60 and 90% of studies) were mainly used as LATs. Pooled ORs of OS and PFS were 3.492 (95% CI:2.612-4.699, P <0.001) and 3.743 (95% CI: 2.586-5.419, P <0.001), favoring LAT, respectively. Sensitivity analyses, including RCTs showed ORs of 4.111 ( P <0.001) and 4.959 ( P =0.001) regarding OS and PFS, favoring LCT, respectively. Pooled 1-year and 2-year OS rates were 83.8 and 58.4% in LAT arms, whereas 64.4 and 31% in control arms; pooled 1-year and 2-year PFS rates were 64.6 and 32.8% in LAT arms, and 36.1 and 10% in control arms. In subgroup analyses, the pooled ORs were 3.981 ( P <0.001), 3.355 ( P <0.001), and 1.726 ( P =0.373) in synchronous, oligopersistence, and oligoprogression/recurrence subgroups, respectively. Regarding PFS comparison, pooled ORs were 5.631 ( P <0.001), 3.484 ( P <0.001), and 1.777 ( P =0.07), respectively. According to metastatic burden categories, pooled ORs favored LAT arms in both analyses including low-metastatic and high-metastatic burden subgroups. CONCLUSION The present study supports the role of LAT in treating nonsmall cell lung cancer oligometastasis. The oligoprogression/recurrence disease could have less LAT benefit than synchronous or oligopersistent disease.
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Affiliation(s)
- Chai Hong Rim
- Department of Radiation Oncology, Ansan Hospital, Gyeonggi-do
| | - Won Kyung Cho
- Samsung Medical Center, Sungkyunkwan University School of Medicine
| | - Sunmin Park
- Department of Radiation Oncology, Ansan Hospital, Gyeonggi-do
| | - Won Sup Yoon
- Department of Radiation Oncology, Ansan Hospital, Gyeonggi-do
| | - Dae Sik Yang
- Guro Hospital, Korea University School of Medicine, Seoul, Republic of Korea
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Li AY, Gaebe K, Zulfiqar A, Lee G, Jerzak KJ, Sahgal A, Habbous S, Erickson AW, Das S. Association of Brain Metastases With Survival in Patients With Limited or Stable Extracranial Disease: A Systematic Review and Meta-analysis. JAMA Netw Open 2023; 6:e230475. [PMID: 36821113 PMCID: PMC9951042 DOI: 10.1001/jamanetworkopen.2023.0475] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
IMPORTANCE Intracranial metastatic disease (IMD) is a severe complication of cancer with profound prognostic implications. Patients with IMD in the setting of limited or stable extracranial disease (IMD-SE) may represent a unique and understudied subset of patients with IMD with superior prognosis. OBJECTIVE To evaluate overall survival (OS), progression-free survival (PFS), and intracranial PFS (iPFS) in patients with IMD-SE secondary to any primary cancer. DATA SOURCES Records were identified from MEDLINE, EMBASE, CENTRAL, and gray literature sources from inception to June 21, 2021. STUDY SELECTION Studies in English reporting OS, PFS, or iPFS in patients with IMD-SE (defined as IMD and ≤2 extracranial metastatic sites) and no prior second-line chemotherapy or brain-directed therapy were selected. DATA EXTRACTION AND SYNTHESIS Author, year of publication, type of study, type of primary cancer, and outcome measures were extracted. Random-effects meta-analyses were performed to estimate effect sizes, and subgroup meta-analysis and metaregression were conducted to measure between-study differences in February 2022. MAIN OUTCOMES AND MEASURES The primary end point was OS described as hazard ratios (HRs) and medians for comparative and single-group studies, respectively. Secondary end points were PFS and iPFS. RESULTS Overall, 68 studies (5325 patients) were included. IMD-SE was associated with longer OS (HR, 0.52; 95% CI, 0.39-0.70) and iPFS (HR, 0.63; 95% CI, 0.52-0.76) compared with IMD in the setting of progressive extracranial disease. The weighted median OS estimate for patients with IMD-SE was 17.9 months (95% CI, 16.4-22.0 months), and for patients with IMD-PE it was 8.0 months (95% CI, 7.2-12.8 months). Pooled median OS for all patients with IMD-SE was 20.9 months (95% CI, 16.35-25.98 months); for the subgroup with breast cancer it was 20.2 months (95% CI, 10.43-38.20 months), and for non-small cell lung cancer it was 27.5 months (95% CI, 18.27-49.66 months). Between-study heterogeneity for OS and iPFS were moderate (I2 = 56.5%) and low (I2 = 0%), respectively. CONCLUSIONS AND RELEVANCE In this systematic review and meta-analysis of patients with IMD-SE, limited systemic disease was associated with improved OS and iPFS. Future prospective trials should aim to collect granular information on the extent of extracranial disease to identify drivers of mortality and optimal treatment strategies in patients with brain metastases.
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Affiliation(s)
- Alyssa Y. Li
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Karolina Gaebe
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Amna Zulfiqar
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Grace Lee
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Katarzyna J. Jerzak
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
- Division of Medical Oncology, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Arjun Sahgal
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Steven Habbous
- Ontario Health (Cancer Care Ontario), Toronto, Ontario, Canada
- Epidemiology and Biostatistics, Western University, London, Ontario, Canada
| | - Anders W. Erickson
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
- Department of Laboratory Medicine and Pathobiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Sunit Das
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
- Department of Laboratory Medicine and Pathobiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
- Division of Neurosurgery, Department of Surgery, University of Toronto, St Michael’s Hospital, Toronto, Ontario, Canada
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Liu CS, Song YQ, Wang RZ, Wang Z, He R, Xu K, Wang CY, Wu Y, Wang Y, Zhang XF, Li G, Wang TL. Thorax radiotherapy using 18F-positron emission tomography/computed tomography-guided precision radiotherapy is a prognostic factor for survival in patients with extracranial oligometastatic non-small cell lung cancer:A two-center propensity score-matched analysis. Front Oncol 2022; 12:991378. [PMID: 36353556 PMCID: PMC9639371 DOI: 10.3389/fonc.2022.991378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 10/03/2022] [Indexed: 11/25/2022] Open
Abstract
Background This retrospective study compared positron emission tomography (PET)/computed tomography (CT) and CT in the treatment of extracranial oligometastatic non-small-cell lung cancer (NSCLC) and explored the impact of thorax radiotherapy (TRT) on patient survival. Methods We reviewed the medical records of Chinese patients with stage IV extracranial oligometastatic NSCLC who underwent PET/CT or CT at two centers. Propensity score matching (PSM) was used to control differences in patient characteristics between the maintenance chemotherapy alone and TRT plus maintenance chemotherapy groups. Results We analyzed 192 eligible patients. The median survival time was better in patients who received PET/CT than in those who only received CT (n = 192, 16 months vs. 6 months, p<0.001). Subgroup analysis showed the median survival time was significantly longer in the TRT plus maintenance group than in the chemotherapy alone group in patients who underwent PET/CT examinations (n = 94, 25 months vs. 11 months, p<0.001). However, there was no statistical difference in survival between both groups in patients who underwent CT examinations (n = 98, 8 months vs. 5 months, p = 0.180). A multifactorial analysis revealed a more favorable prognosis in patients who underwent PET/CT evaluation (HR: 0.343, 95% CI: 0.250-0.471, p <0.001) and TRT (HR: 0.624, 95% CI: 0.464-0.840, p = 0.002), than in those who did not. PSM was consistent with these results. Conclusions PET/CT-guided TRT is associated with improved clinical outcomes in patients with stage IV extracranial oligometastatic NSCLC.
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Affiliation(s)
- Cheng-Sen Liu
- Department of Radiotherapy, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning, China
| | - Ying-Qiu Song
- Department of Radiotherapy, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning, China
| | - Run-Ze Wang
- Department of Radiotherapy, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning, China
| | - Zheng Wang
- Department of Thoracic Surgery, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning, China
| | - Rong He
- Department of Thoracic Surgery, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning, China
| | - Ke Xu
- Department of Thoracic Surgery, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning, China
| | - Chen-Yu Wang
- Department of Information Management, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning, China
| | - Yu Wu
- Department of Radiotherapy, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning, China
| | - Ye Wang
- Department of Radiotherapy, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning, China
| | - Xiao-fang Zhang
- Department of Radiotherapy, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning, China
| | - Guang Li
- Department of Radiotherapy, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Tian-Lu Wang
- Department of Radiotherapy, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning, China
- *Correspondence: Tian-Lu Wang,
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Rim CH, Cho WK, Lee JH, Kim YS, Suh YG, Kim KH, Chie EK, Ahn YC. Role of Local Treatment for Oligometastasis: A Comparability-Based Meta-Analysis. Cancer Res Treat 2022; 54:953-969. [PMID: 35989655 PMCID: PMC9582460 DOI: 10.4143/crt.2022.329] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 08/13/2022] [Indexed: 11/21/2022] Open
Abstract
PURPOSE We intend to investigate the oncological efficacy and feasibility of local consolidative therapy (LCT) through a meta-analysis method. MATERIALS AND METHODS Four databases including PubMed, MEDLINE, Embase, and Cochrane library were searched. Target studies are controlled trials comparing outcomes of LCT versus a control group. Primary endpoints are overall survival (OS) and progression-free survival (PFS). RESULTS A total of 54 studies involving 7,242 patients were included. Pooled analyses showed that the LCT arm could achieve improved OS with pooled odds ratio of 2.896 (95% confidence interval [CI], 2.377 to 3.528; p < 0.001). Regarding PFS, pooled analyses showed pooled odds ratio of 3.045 (95% CI, 2.356 to 3.937; p < 0.001) in favor of the LCT arm. In the subgroup analyses including the studies with reliable comparability (e.g. randomized studies or intentionally matched studies without significant favorable prognosticator in LCT arms), pooled odds ratio was 2.548 (95% CI, 1.808 to 3.591; p < 0.001) favoring the LCT arm regarding OS. Regarding PFS, pooled OR was 2.656 (95% CI, 1.713 to 4.120; p < 0.001) which also favored the LCT arm. Subgroup analyses limited to the randomized controlled trials (RCT) were also performed and pooled odds ratios on OS and PFS were 1.535 (95% CI, 1.082 to 2.177; p=0.016) and 1.668 (95% CI, 1.187 to 2.344; p=0.003). The rates of grade ≥ 3 complications related to LCT was mostly low (< 10%) and not significantly higher compared to the control arm. CONCLUSION Pooled analyses results of all included studies, selected studies with reliable comparability, and RCT's demonstrated the survival benefit of LCT. These consistent results suggest that LCT was beneficial to the patients with oligometastasis.
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Affiliation(s)
- Chai Hong Rim
- Department of Radiation Oncology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan,
Korea
| | - Won Kyung Cho
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul,
Korea
| | - Jong Hoon Lee
- Department of Radiation Oncology, St. Vincent’s Hospital, College of Medicine, The Catholic University of Korea, Suwon,
Korea
| | - Young Seok Kim
- Department of Radiation Oncology, Asan Medical Center, Ulsan University College of Medicine, Seoul,
Korea
| | - Yang-Gun Suh
- Proton Therapy Center, Research Institute and Hospital, National Cancer Center, Goyang,
Korea
| | - Kyung Hwan Kim
- Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul,
Korea
| | - Eui Kyu Chie
- Department of Radiation Oncology, Seoul National University College of Medicine, Seoul,
Korea
| | - Yong Chan Ahn
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul,
Korea
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Wang N, Qiao Y, Song Y, Wang Z, Li X, Liu C, Wang Y, Wu Y, He R, Wang C, Ren Y, Li G, Wang T. In 18F-positron emission tomography/computed tomography-guided precision radiotherapy for centrally located non-small cell lung cancer, tumor related atelectasis is a prognostic factor of survival. Front Oncol 2022; 12:898233. [PMID: 35965530 PMCID: PMC9366137 DOI: 10.3389/fonc.2022.898233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 06/24/2022] [Indexed: 11/13/2022] Open
Abstract
PurposeTumor related atelectasis(TRA) is an essential factor affecting survival that can cause chest pain, cough, hemoptysis, chest tightness, dyspnea, and even death. In the current study, we explored the possible impact of TRA on survival in cancer patients and the guiding significance of 18F-positron emission tomography/computed(PET/CT) in radiotherapy for patients with atelectasis tumors.MethodsIn this retrospective study, we analyzed the treatment model and survival of patients with centrally located non-small cell lung cancer(NSCLC) treated with radiotherapy at two medical centers between May 2005 and August 2019. We identified 152 eligible patients and used propensity score matching (1:1) to process the data to reduce confounding factors, data bias, and mal-distribution.ResultsWe used propensity scores created well-matched groups of 57 patients overall with or without TRA. The one-year survival rate of all patients was 71.9%, and the two-year survival rate was 33.3%. Compared to the atelectasis group, the overall survival (OS) of patients in the non-atelectasis group was significantly prolonged (25 months vs. 17 months, p = 0.004), as well as in the atelectasis recovery group (28 months vs. 14 months, p = 0.008). In multivariate analysis, non-atelectasis was closely correlated with favorable OS (HR, 1.804 (−2.840); 95% CI, 1.145–2.840; p = 0.011).ConclusionPET/CT can accurately stage NSCLC and better guide the treatment of NSCLC complicated with atelectasis. Tumor-associated atelectasis in patients with centrally located NSCLC can lead to is a poor prognostic marker.
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Affiliation(s)
- Nan Wang
- Department of Radiotherapy, Liaoning Cancer Hospital & Institute, Cancer Hospital of China Medical University, Shenyang, China
| | - Yun Qiao
- Department of Surgery, Liaoning Cancer Hospital & Institute, Cancer Hospital of China Medical University, Shenyang, China
| | - Yingqiu Song
- Department of Radiotherapy, Liaoning Cancer Hospital & Institute, Cancer Hospital of China Medical University, Shenyang, China
| | - Zheng Wang
- Department of Cerebral Surgery, Liaoning Cancer Hospital & Institute, Shenyang, China
| | - Xia Li
- Department of Radiotherapy, Liaoning Cancer Hospital & Institute, Cancer Hospital of China Medical University, Shenyang, China
| | - Chengsen Liu
- Department of Radiotherapy, Liaoning Cancer Hospital & Institute, Cancer Hospital of China Medical University, Shenyang, China
| | - Ye Wang
- Department of Radiotherapy, Liaoning Cancer Hospital & Institute, Cancer Hospital of China Medical University, Shenyang, China
| | - Yu Wu
- Department of Radiotherapy, Liaoning Cancer Hospital & Institute, Cancer Hospital of China Medical University, Shenyang, China
| | - Rong He
- Department of Cerebral Surgery, Liaoning Cancer Hospital & Institute, Shenyang, China
| | - Chenyu Wang
- Department of Information Management, Liaoning Cancer Hospital & Institute, Shenyang, China
| | - Yangwu Ren
- Department of Epidemiology, School of Public Health, China Medical University, Shenyang, China
| | - Guang Li
- Department of Radiotherapy, The First Hospital of China Medical University, Shenyang, China
| | - Tianlu Wang
- Department of Radiotherapy, Liaoning Cancer Hospital & Institute, Cancer Hospital of China Medical University, Shenyang, China
- *Correspondence: Tianlu Wang,
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Wu Y, Verma V, Liang F, Lin Q, Zhou Z, Wang Z, Wang Y, Wang J, Chang JY. Local consolidative therapy versus systemic therapy alone for metastatic non-small cell lung cancer: a systematic review and meta-analysis. Int J Radiat Oncol Biol Phys 2022; 114:635-644. [DOI: 10.1016/j.ijrobp.2022.02.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 02/08/2022] [Accepted: 02/15/2022] [Indexed: 10/31/2022]
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Rim CH, Shin IS, Park S, Lee HY. Benefits of local consolidative treatment in oligometastases of solid cancers: a stepwise-hierarchical pooled analysis and systematic review. NPJ Precis Oncol 2021; 5:2. [PMID: 33479481 PMCID: PMC7820397 DOI: 10.1038/s41698-020-00141-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 12/01/2020] [Indexed: 01/29/2023] Open
Abstract
We conducted a meta-analysis of articles published in PubMed, MEDLINE, EMBASE, and Cochrane library to investigate the effectiveness of local consolidative therapy (LCT) against oligometastases. Data from randomized controlled trials (RCTs), balanced studies, and all studies combined were analyzed in a hierarchical manner. Pooled analyses of 31 studies (including seven randomized trials) investigating the effectiveness of LCT on overall survival revealed odds ratios of 3.04, 2.56, and 1.41 for all studies, balanced studies, and RCTs, respectively (all p < 0.05). The benefit of LCT was more prominent in patients with non-small cell lung and colorectal cancers than in those with prostate and small cell lung cancers. Moreover, the benefit of LCT was smaller in patients with high metastatic burdens (p = 0.054). In four of 12 studies with available information, additional grade ≥3 toxicities due to LCTs were reported. Overall, LCT is beneficial for patients with oligometastases, although such benefits are less evident in RCTs than in observational studies. Appropriate LCTs should be carefully selected considering their feasibility, disease type, and metastatic burden.
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Affiliation(s)
- Chai Hong Rim
- grid.222754.40000 0001 0840 2678Department of Radiation Oncology, Ansan Hospital, Korea University Medical College, Ansan, Gyeonggi-do Republic of Korea
| | - In-Soo Shin
- grid.255168.d0000 0001 0671 5021Graduate school of Education, Dongguk University, Seoul, Korea
| | - Sunmin Park
- grid.222754.40000 0001 0840 2678Department of Radiation Oncology, Ansan Hospital, Korea University Medical College, Ansan, Gyeonggi-do Republic of Korea
| | - Hye Yoon Lee
- grid.222754.40000 0001 0840 2678Department of General Surgery, Ansan Hospital, Korea University Medical College, Ansan, Gyeonggi-do Republic of Korea
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Consolidative stereotactic ablative radiotherapy (SABR) to intrapulmonary lesions is associated with prolonged progression-free survival and overall survival in oligometastatic NSCLC patients: A prospective phase 2 study. Lung Cancer 2020; 152:119-126. [PMID: 33385737 DOI: 10.1016/j.lungcan.2020.12.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 12/14/2020] [Accepted: 12/23/2020] [Indexed: 02/09/2023]
Abstract
OBJECTIVES Stereotactic Ablative Radiotherapy (SABR) has shown high rates of local control and prolonged survival in early-stage non-small cell lung cancer (NSCLC), though its role in oligometastatic disease is undefined. This study aimed to evaluate SABR as a local consolidative therapy (LCT) in oligometastatic NSCLC patients. METHODS In this prospective, single-arm phase 2 trial, we sought to evaluate SABR in patients with stage IV NSCLC, with ≤ five lesions, including the primary tumor. Patients received initial systemic therapy according to international guidelines. Patients without progression after front-line therapy (two months of targeted therapy and ≥ four cycles of chemotherapy) were evaluated by an 18F-FDG-PET/CT to receive consolidative SABR (45-60 Gy in 3-5 fractions) to the primary and all intrapulmonary metastatic sites. The primary endpoint was progression-free survival (PFS); secondary endpoints were overall survival (OS) and toxicity. RESULTS A total of 47 patients were included. Mean age was 58.9 years, 59.6 % were female, 87.2 % had adenocarcinoma histology, and the contralateral lung was the main site of metastases in 42.6 %. All patients received systemic front-line therapy, chemotherapy in 61.7 %, and a tyrosine kinase inhibitor (TKI) in 38.3 %. Disease control rate (DCR) and complete metabolic response (CMR) to SABR were 93.6 % and 70.2 %. Median PFS was 34.3 months (95 %CI; 31.1-38.8) for the total cohort; patients with a CMR had a median PFS of 53.9 monthsvs.31.9 months in those without CMR (p = 0.011). Median OS was not reached.Grade 1, 2, and 3 pneumonitis were observed in 79.5 % (31/39), 12.8 % (5/39) and 7.7 % (3/39), respectively. No grade ≥4 toxicities were observed. CONCLUSION The use of SABR as LCT in oligometastatic NSCLC patients was well tolerated and showed favorable results regarding PFS and OS compared with historical data. The benefit was significantly higher in patients who reached a CMR as assessed by 18F-FDG-PET/CT.
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