Post-induction Strategies in Metastatic Colorectal Cancer Patients Treated With First-Line Anti-EGFR-Based Treatment: A Systematic Review and Meta-Analysis.

Few data from randomized clinical trials (RCTs) investigating the efficacy of post-induction strategies after the first-line treatment with anti-Epidermal Growth Factor Receptor (EGFR) in patients with metastatic colorectal cancer (mCRC) are available. A systematic review and metanalysis might therefore be useful to highlight and even strengthen these data. A literature search in Pubmed, Embase, American Society of Clinical Oncology (ASCO) Annual Meetings, ASCO Gastrointestinal Symposia, and European Society for Medical Oncology (ESMO) Congresses was performed. The search included RCTs of patients with mCRC treated with an initial period of cytotoxic chemotherapy (CT) in association with anti-EGFR (ie, panitumumab or cetuximab) as first-line regimen, and then switched to one of the following strategies: observation; maintenance with anti-EGFR, fluoropyrimidine (FP), or both; or continuing the induction regimen until disease progression or unacceptable toxicity. Outcomes of interest included overall survival (OS) and progression-free survival (PFS). The overall effect was pooled using the Mantel-Haenszel method fixed-effect model or the DerSimonian-Laird method random-effect model according to heterogeneity (I

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