Abstract
The aim of this study was to evaluate the serum pattern of cytokines evolution after surgical radiofrequency ablation (SRFA) of colorectal metastases. Metastases of ten non consecutive patients were destroyed by radiofrequency ablation without concomitant resection after a complete surgical procedure including a laparotomy, a peritoneal examination, liver mobilisation and liver ultrasound. Serum levels of IL-6, TNFalpha, HGF, VEGF, bFGF, TGFbeta1 and CRP were assessed by ELISA assays at different time points. TNFalpha and bFGF remained undetectable. IL-6 peaked at 3 hours and remained elevated during the entire study period. HGF increased by three-fold by Day 1 then decreased until Day 7 where it was still twice its baseline level. VEGF level increased from Day 5 onward. TGFbeta1 did not show significant variations. CRP was increased throughout the study. In contrast with cryotherapy, SRFA does not lead to high serum TNFalpha suggesting a better tolerance. Nevertheless high IL-6, HGF and VEGF serum levels are characteristic of a general inflammatory stress which should be taken into account.
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