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Surgical treatment of stage IV colorectal cancer with synchronous liver metastases : a systematic review and network meta-analysis

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Abstract
Background: The ideal treatment approach for colorectal cancer (CRC) with synchronous liver metastases (SCRLM) remains debated. We performed a network meta-analysis (NMA) comparing the 'bowel-first' approach (BFA), simultaneous resection (SIM), and the 'liver-first' approach (LFA). Methods: A systematic search of comparative studies in CRC with SCRLM was undertaken using the Embase, PubMed, Web of Science, and CENTRAL databases. Outcome measures included postoperative complications, 30- and 90-day mortality, chemotherapy use, treatment completion rate, 3- and 5-year recurrence-free survival, and 3- and 5-year overall survival (OS). Pairwise and network meta-analysis were performed to compare strategies. Heterogeneity was assessed using the Higgins I-2 statistic. Results: One prospective and 43 retrospective studies reporting on 10 848 patients were included. Patients undergoing the LFA were more likely to have rectal primaries and a higher metastatic load. The SIM approach resulted in a higher risk of major morbidity and 30-day mortality. Compared to the BFA, the LFA more frequently resulted in failure to complete treatment as planned (34% versus 6%). Pairwise and network meta-analysis showed a similar 5-year OS between LFA and BFA and a more favorable 5-year OS after SIM compared to LFA (odds ratio 0.25-0.90, p = 0.02, I-2 = 0%), but not compared to BFA. Conclusion: Despite a higher tumor load in LFA compared to BFA patients, survival was similar. A lower rate of treatment completion was observed with LFA. Uncertainty remains substantial due to imprecise estimates of treatment effects. In the absence of prospective trials, treatment of stage IV CRC patients should be individually tailored. (C) 2020 Elsevier Ltd, BASO similar to The Association for Cancer Surgery, and the European Society of Surgical Oncology. All rights reserved.
Keywords
Bowel-first approach, Colorectal cancer, Liver-first approach, Reversed approach, Synchronous liver metastases, Meta-analysis, SIMULTANEOUS RESECTION, RECTAL-CANCER, PRIMARY TUMOR, HEPATIC RESECTION, SURGERY, OUTCOMES, STRATEGY, MANAGEMENT, SURVIVAL, CHEMOTHERAPY

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MLA
Ghiasloo, Mohammad, et al. “Surgical Treatment of Stage IV Colorectal Cancer with Synchronous Liver Metastases : A Systematic Review and Network Meta-Analysis.” EUROPEAN JOURNAL OF SURGICAL ONCOLOGY, vol. 46, no. 7, 2020, pp. 1203–13, doi:10.1016/j.ejso.2020.02.040.
APA
Ghiasloo, M., Pavlenko, D., Verhaeghe, M., Van Langenhove, Z., Uyttebroek, O., Berardi, G., … Ceelen, W. (2020). Surgical treatment of stage IV colorectal cancer with synchronous liver metastases : a systematic review and network meta-analysis. EUROPEAN JOURNAL OF SURGICAL ONCOLOGY, 46(7), 1203–1213. https://doi.org/10.1016/j.ejso.2020.02.040
Chicago author-date
Ghiasloo, Mohammad, Diane Pavlenko, Marzia Verhaeghe, Zoé Van Langenhove, Ortwin Uyttebroek, Giammauro Berardi, Roberto Troisi, and Wim Ceelen. 2020. “Surgical Treatment of Stage IV Colorectal Cancer with Synchronous Liver Metastases : A Systematic Review and Network Meta-Analysis.” EUROPEAN JOURNAL OF SURGICAL ONCOLOGY 46 (7): 1203–13. https://doi.org/10.1016/j.ejso.2020.02.040.
Chicago author-date (all authors)
Ghiasloo, Mohammad, Diane Pavlenko, Marzia Verhaeghe, Zoé Van Langenhove, Ortwin Uyttebroek, Giammauro Berardi, Roberto Troisi, and Wim Ceelen. 2020. “Surgical Treatment of Stage IV Colorectal Cancer with Synchronous Liver Metastases : A Systematic Review and Network Meta-Analysis.” EUROPEAN JOURNAL OF SURGICAL ONCOLOGY 46 (7): 1203–1213. doi:10.1016/j.ejso.2020.02.040.
Vancouver
1.
Ghiasloo M, Pavlenko D, Verhaeghe M, Van Langenhove Z, Uyttebroek O, Berardi G, et al. Surgical treatment of stage IV colorectal cancer with synchronous liver metastases : a systematic review and network meta-analysis. EUROPEAN JOURNAL OF SURGICAL ONCOLOGY. 2020;46(7):1203–13.
IEEE
[1]
M. Ghiasloo et al., “Surgical treatment of stage IV colorectal cancer with synchronous liver metastases : a systematic review and network meta-analysis,” EUROPEAN JOURNAL OF SURGICAL ONCOLOGY, vol. 46, no. 7, pp. 1203–1213, 2020.
@article{8654246,
  abstract     = {Background: The ideal treatment approach for colorectal cancer (CRC) with synchronous liver metastases (SCRLM) remains debated. We performed a network meta-analysis (NMA) comparing the 'bowel-first' approach (BFA), simultaneous resection (SIM), and the 'liver-first' approach (LFA).
Methods: A systematic search of comparative studies in CRC with SCRLM was undertaken using the Embase, PubMed, Web of Science, and CENTRAL databases. Outcome measures included postoperative complications, 30- and 90-day mortality, chemotherapy use, treatment completion rate, 3- and 5-year recurrence-free survival, and 3- and 5-year overall survival (OS). Pairwise and network meta-analysis were performed to compare strategies. Heterogeneity was assessed using the Higgins I-2 statistic.
Results: One prospective and 43 retrospective studies reporting on 10 848 patients were included. Patients undergoing the LFA were more likely to have rectal primaries and a higher metastatic load. The SIM approach resulted in a higher risk of major morbidity and 30-day mortality. Compared to the BFA, the LFA more frequently resulted in failure to complete treatment as planned (34% versus 6%). Pairwise and network meta-analysis showed a similar 5-year OS between LFA and BFA and a more favorable 5-year OS after SIM compared to LFA (odds ratio 0.25-0.90, p = 0.02, I-2 = 0%), but not compared to BFA.
Conclusion: Despite a higher tumor load in LFA compared to BFA patients, survival was similar. A lower rate of treatment completion was observed with LFA. Uncertainty remains substantial due to imprecise estimates of treatment effects. In the absence of prospective trials, treatment of stage IV CRC patients should be individually tailored. (C) 2020 Elsevier Ltd, BASO similar to The Association for Cancer Surgery, and the European Society of Surgical Oncology. All rights reserved.},
  author       = {Ghiasloo, Mohammad and Pavlenko, Diane and Verhaeghe, Marzia and Van Langenhove, Zoé and Uyttebroek, Ortwin and Berardi, Giammauro and Troisi, Roberto and Ceelen, Wim},
  issn         = {0748-7983},
  journal      = {EUROPEAN JOURNAL OF SURGICAL ONCOLOGY},
  keywords     = {Bowel-first approach,Colorectal cancer,Liver-first approach,Reversed approach,Synchronous liver metastases,Meta-analysis,SIMULTANEOUS RESECTION,RECTAL-CANCER,PRIMARY TUMOR,HEPATIC RESECTION,SURGERY,OUTCOMES,STRATEGY,MANAGEMENT,SURVIVAL,CHEMOTHERAPY},
  language     = {eng},
  number       = {7},
  pages        = {1203--1213},
  title        = {Surgical treatment of stage IV colorectal cancer with synchronous liver metastases : a systematic review and network meta-analysis},
  url          = {http://dx.doi.org/10.1016/j.ejso.2020.02.040},
  volume       = {46},
  year         = {2020},
}

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