What is the Best Therapeutic Strategy for Metachronous Resectable Colorectal Liver Metastases After Adjuvant Oxaliplatin-Based Chemotherapy? A Multidisciplinary Inter-Group Survey.

Background: To report the current clinical practice of French physicians for metachronous resectable liver metastasis (LM) occurring after a FOLFOX adjuvant chemotherapy for primary cancer. Methods: Twenty four clinical situations were proposed to a panel of experts via 4 learned societies. Clinical situations varied according time of recurrence (early between 6 and 12 month or > 12 month), extension of LM (limited ≤ 2 or extended > 2 lesions), presence of a neuropathy or not, and of a RAS or BRAF mutation. Results: A total of 157 physicians participated in this study. A consensus was reached in 17 (71%) clinical situations. For an early limited recurrence, whatever presence of neuropathy, the preferred therapeutic approach (45%) was upfront surgery. For an early extended recurrence, whatever presence of neuropathy, there was a consensus (64%) for a preoperative chemotherapy by FOLFIRI + biologic agent. For a late recurrence without neuropathy, there was a consensus (50%) for a preoperative FOLFOX chemotherapy, whatever the extension of LM. For a late recurrence with neuropathy, upfront surgery was chosen (52%) for limited LM, and preoperative chemotherapy by FOLFIRI + biologic agent (73%) for extended LM. No response was influenced by the RAS mutation status. There was a strong consensus for intensified preoperative chemotherapy in all clinical situations for BRAF-mutated LM. Conclusions: This national survey provides an overview of the practice patterns in the treatment of LM occurring after adjuvant FOLFOX for primary. It could be a basis to establish expert's recommendations for the clinical practice. [ABSTRACT FROM AUTHOR]