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Advances in Radiation Oncology Jul 2024Initial studies investigating the combination of local and systemic treatments in advanced esophageal cancer (EC) have conflicting conclusions regarding survival... (Review)
Review
PURPOSE
Initial studies investigating the combination of local and systemic treatments in advanced esophageal cancer (EC) have conflicting conclusions regarding survival benefits. The objective of this systematic review and meta-analysis is to assess the efficacy of the addition of local therapy to systemic treatments in patients with advanced EC.
METHODS AND MATERIALS
A systematic literature search was conducted in the PubMed, EMBASE, and CENTRAL databases. Key eligibility criteria included studies that enrolled patients with histologically confirmed EC or esophagogastric junction cancer with metastasis or recurrence and compared survival benefits between the combined local and systemic treatment group and the systemic treatment alone group. Survival outcomes, represented by hazard ratios (HRs) of progression-free survival (PFS) and overall survival (OS), were pooled using a random effects model. The MINORS score was adopted for quality assessment. Risk of bias was statistically examined by Begg's and Egger's tests.
RESULTS
A total of 1 randomized controlled trial (RCT) and 10 qualified retrospective studies including 14,489 patients were identified. Addition of local therapy to systemic treatment significantly improved PFS (HR, 0.52; 95% CI, 0.37-0.73; < .001) and OS (HR, 0.69; 95% CI, 0.58-0.81; < .0001) compared with systemic treatment alone. The subgroup analysis revealed that combined local and systemic treatment conferred a significant survival advantage in both patients with oligometastasis (PFS: HR, 0.45; 95% CI, 0.31-0.64; < .0001; OS: HR, 0.62; 95% CI, 0.48-0.79; < .0001) and recurrence (OS: HR, 0.55; 95% CI, 0.37-0.81; = .002).
CONCLUSIONS
In conclusion, addition of local treatment to systemic therapy can improve survival in patients with advanced EC, particularly in those with oligometastasis or recurrent diseases.
PubMed: 38826154
DOI: 10.1016/j.adro.2024.101522 -
European Journal of Cancer (Oxford,... Jun 2024The OligoMetastatic Esophagogastric Cancer (OMEC) project aims to provide clinical practice guidelines for the definition, diagnosis, and treatment of esophagogastric...
INTRODUCTION
The OligoMetastatic Esophagogastric Cancer (OMEC) project aims to provide clinical practice guidelines for the definition, diagnosis, and treatment of esophagogastric oligometastatic disease (OMD).
METHODS
Guidelines were developed according to AGREE II and GRADE principles. Guidelines were based on a systematic review (OMEC-1), clinical case discussions (OMEC-2), and a Delphi consensus study (OMEC-3) by 49 European expert centers for esophagogastric cancer. OMEC identified patients for whom the term OMD is considered or could be considered. Disease-free interval (DFI) was defined as the time between primary tumor treatment and detection of OMD.
RESULTS
Moderate to high quality of evidence was found (i.e. 1 randomized and 4 non-randomized phase II trials) resulting in moderate recommendations. OMD is considered in esophagogastric cancer patients with 1 organ with ≤ 3 metastases or 1 involved extra-regional lymph node station. In addition, OMD continues to be considered in patients with OMD without progression in number of metastases after systemic therapy. F-FDG PET/CT imaging is recommended for baseline staging and for restaging after systemic therapy when local treatment is considered. For patients with synchronous OMD or metachronous OMD and a DFI ≤ 2 years, recommended treatment consists of systemic therapy followed by restaging to assess suitability for local treatment. For patients with metachronous OMD and DFI > 2 years, upfront local treatment is additionally recommended.
DISCUSSION
These multidisciplinary European clinical practice guidelines for the uniform definition, diagnosis and treatment of esophagogastric OMD can be used to standardize inclusion criteria in future clinical trials and to reduce variation in treatment.
Topics: Humans; Esophageal Neoplasms; Stomach Neoplasms; Europe; Consensus; Neoplasm Metastasis; Delphi Technique
PubMed: 38678762
DOI: 10.1016/j.ejca.2024.114062 -
Defining oligometastatic pancreatic cancer: a systematic review and critical synthesis of consensus.ESMO Open Dec 2023Small retrospective series suggest that local consolidative treatment (LCT) may improve survival in oligometastatic pancreatic ductal adenocarcinoma (PDAC). However, no...
BACKGROUND
Small retrospective series suggest that local consolidative treatment (LCT) may improve survival in oligometastatic pancreatic ductal adenocarcinoma (PDAC). However, no uniform definition of oligometastatic disease (OMD) in PDAC exists; this impedes meaningful conclusions.
PATIENTS AND METHODS
A systematic literature search using PubMed, Web of Science, and Cochrane CENTRAL registries for studies and protocols reporting on definitions and/or LCT of OMD in PDAC was performed. The primary endpoint was the definition of OMD. Levels of agreement were categorized as consensus (≥75% agreement between studies), fair agreement (50%-74%), and absent/poor agreement (<50%).
RESULTS
After screening of 5374 abstracts, the full text of 218 studies was assessed, of which 76 were included in the qualitative synthesis. The majority of studies were retrospective (n = 66, 87%), two were prospective studies and eight were study protocols. Studies investigated mostly liver (n = 38, 51%) and lung metastases (n = 15, 20%). Across studies, less than one-half (n = 32, 42%) reported a definition of OMD, while 44 (58%) did not. Involvement was limited to a single organ (consensus). Additional criteria for defining OMD were the number of lesions (consensus), metastatic site (poor agreement), metastatic size (poor agreement), treatment possibilities (poor agreement), and biomarker response (poor agreement). Liver OMD could involve three or fewer lesions (consensus) and synchronous disease (fair agreement), while lung metastases could involve two or fewer lesions and metachronous disease (consensus). The large majority of studies were at a high risk of bias or did not include any control groups.
CONCLUSION
Definitions of OMD were not used or varied widely between studies hampering across-study comparability and highlighting an unmet need for a consensus. The present study is part of a multistep process that aims to develop an interdisciplinary consensus on OMD in pancreatic cancer.
Topics: Humans; Retrospective Studies; Prospective Studies; Consensus; Lung Neoplasms; Pancreatic Neoplasms
PubMed: 37988953
DOI: 10.1016/j.esmoop.2023.102067 -
Cancers Jul 2023To analyze the efficacy and safety of surgery compared to radiosurgery (RS), combined or not with whole brain radiotherapy (WBRT), for localized metastatic brain... (Review)
Review
To analyze the efficacy and safety of surgery compared to radiosurgery (RS), combined or not with whole brain radiotherapy (WBRT), for localized metastatic brain disease. A systematic review with meta-analysis was conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2020 guidelines. The inclusion criteria were limited to randomized controlled trials (RCTs) that compared surgery and RS for patients with up to 3 metastases (median diameter ≤ 4 cm). The primary outcomes were represented by overall survival (OS) and local brain progression-free survival (PFS), with the rate of complications as a secondary outcome. The pooled estimates were calculated using random forest models. The risk of bias was evaluated using the RoB2 revised tool and the certainty of the evidence was assessed according to the GRADE guidelines. In total, 11,256 records were identified through database and register searches. After study selection, 3 RCTs and 353 patients were included in the quantitative synthesis. Surgery and RS represented the main intervention arms in all the included RCTs. A low level of evidence suggests that RS alone and surgery followed by WBRT provide an equal rate of local brain PFS in patients with localized metastatic brain disease. There is a very low level of evidence that surgery and RS as main interventions offer equivalent OS in the population investigated. A reliable assessment of the complication rates among surgery and RS was not achievable. The lack of high-certainty evidence either for superiority or equivalence of these treatments emphasizes the need for further, more accurate, RCTs comparing surgery and RS as local treatment in patients with oligometastatic brain disease.
PubMed: 37568618
DOI: 10.3390/cancers15153802 -
Lung Cancer (Amsterdam, Netherlands) Aug 2023A systematic review of treatment characteristics, outcomes, and treatment-related toxicities of stereotactic body radiation therapy (SBRT) for pulmonary oligometastases...
PURPOSE
A systematic review of treatment characteristics, outcomes, and treatment-related toxicities of stereotactic body radiation therapy (SBRT) for pulmonary oligometastases served as the basis for development of this International Stereotactic Radiosurgery Society (ISRS) practice guideline.
METHODS
In accordance with PRISMA guidelines, a systematic review was performed of retrospective series with ≥50 patients/lung metastases, prospective trials with ≥25 patients/lung metastases, analyses of specific high-risk situations, and all randomized trials published between 2012 and July 2022 in the MEDLINE or Embase database using the key words "lung oligometastases", "lung metastases", "pulmonary metastases", "pulmonary oligometastases", "stereotactic body radiation therapy (SBRT)" and "stereotactic ablative body radiotherapy (SBRT)". Weighted random effects models were used to calculate pooled outcomes estimates.
RESULTS
Of the 1884 articles screened, 35 analyses (27 retrospective-, 5 prospective, and 3 randomized trials) reporting on treatment of >3600 patients and >4650 metastases were included. The median local control was 90 % (Range: 57-100 %) at 1 year and 79 % (R: 70-96 %) at 5 years. Acute toxicity ≥3 was reported for 0.5 % and late toxicity ≥3 for 1.8 % of patients. A total of 21 practice recommendations covering the areas of staging & patient selection (n = 10), SBRT treatment (n = 10), and follow-up (n = 1) were developed, with agreements rates of 100 %, except for recommendation 13 (83 %).
CONCLUSION
SBRT represents an effective definitive local treatment modality combining high local control rates with low risk of radiation-induced toxicities.
Topics: Humans; Lung Neoplasms; Radiosurgery; Retrospective Studies; Prospective Studies; Radiation Injuries; Lung
PubMed: 37390723
DOI: 10.1016/j.lungcan.2023.107284