Abstract
Background
New chemotherapy schemes have allowed for a better radiological response of unresectable colorectal liver metastases, leading to an interesting scenario known as a complete radiological response. The aim of this study was to review the current management of missing liver metastases (MLM) from the liver surgeon’s point of view.
Methods
A systematic search was conducted on all publications of PubMed and Embase between 2003 and 2018. Meta-analysis was performed on MLM resected/unresected. Residual tumor or regrowth and relapse-free survival were used as evaluation indices.
Results
After literature search, 18 original articles were included for analysis. The predictive factors for MLM are type and duration of chemotherapy and size and number of lesions. Magnetic resonance is the most sensitive preoperative technique. Regarding clinical management, liver surgery is deemed the fundamental pillar in the therapeutic strategy of these patients. Meta-analysis due to data heterogeneity was inconclusive.
Conclusions
Depending on the clinical context, MLM monitoring appears to be a valid therapeutic alternative. Nevertheless, prospective randomized clinical studies are needed.
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Abbreviations
- CE-IOUS:
-
Contrast intra-operative ultrasound
- CRLM:
-
Colorectal liver metastases
- CPR:
-
Complete pathological response
- CRR:
-
Complete radiological response
- CT:
-
Computer tomography
- HAI:
-
Hepatic arterial infusion
- IOUS:
-
Intra-operative ultrasound
- MLM:
-
Missing liver metastases
- MRI:
-
Magnetic resonance
- SC:
-
Systemic chemotherapy
- SCR:
-
Sustained clinical response
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Acknowledgements
We thank Dr. Junichi Arita, Dr. Stephane Benoist, Dr. Alessandro Ferrero, Dr. Akio Saiura, and Dr. Atsushi Oba for their invaluable comments.
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Elena Ramírez-Maldonado, Rocío García-Pérez, and Joana Ferrer-Fàbrega participated in all phases of the study. Victor Sapena participated in the statistical methodology and results of the meta-analysis. Josep Fuster and Juan Carlos García-Valdecasas participated in the analysis and interpretation of data and critical revision of the manuscript.
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Ramírez-Maldonado, E., García-Pérez, R., Ferrer-Fàbrega, J. et al. Missing colorectal liver metastases: the surgical challenge. Langenbecks Arch Surg 406, 2163–2175 (2021). https://doi.org/10.1007/s00423-021-02297-4
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DOI: https://doi.org/10.1007/s00423-021-02297-4