Radiofrequency ablation of colorectal liver metastases.

INTRODUCTION: Radical liver resection is the only method for the treatment of patients with colorectal liver metastases (CLM); however, only 20-30% of patients with CLMs can be radically treated. Radiofrequency ablation (RFA) is one of the possible methods of palliative treatment in such patients. METHODS: RFA was performed in 381 patients with CLMs between 01 Jan 2001 and 31 Dec 2018. The mean age of the patients was 65.2±8.7 years. The male to female ratio was 2:1. Open laparotomy was done in 238 (62.5%) patients and the CT-navigated transcutaneous approach was used in 143 (37.5%) patients. CLMs.

[Liver metastases of malignant melanoma - utility of resection or radiofrequency ablation]. / Jaterní metastázy maligního melanomu - mají resekce nebo radiofrekvencní ablace smysl?

INTRODUCTION: Incidence of cutaneous and uveal forms of malignant melanoma (MM) has increased significantly in the population in the last years. Biological behavior of both these forms of MM is different and is associated with the development of liver metastases. The prognosis of patients with MM liver metastases is generally poor. The authors seek to consider the sense and the possibilities of surgical treatment of MM liver metastases. METHOD: Seven patients with liver metastases of MM were operated on in the Hepatobiliary Center of the Department of Surgery, University Hospital in Pilsen during the last ten years. Four patients suffered from the uveal and three from the cutaneous form of MM. Mean age of the patients was 58.8 years. R0 liver resection was performed in 3, and radiofrequency ablation in 1 patient. In the remaining 3 patients the operation finished by exploratory laparotomy due to tumor progression. RESULTS: Two patients died in the interval of 6 and 25 months after liver surgery for tumor dissemination. Two patients continue to show disease free survival, currently of 22 and 28 months. CONCLUSION: Liver metastases of MM have a very poor prognosis. Surgical treatment indicated by the multidisciplinary team provides, together with further multimodal treatment, a chance for long-term survival and its indication is justified in selected patients.Key words: malignant melanoma - liver metastases - surgical treatment.

[Comparison of percutaneous and open approach to radiofrequency ablation of colorectal liver metastases in Teaching Hospital Pilsen in 20012015]. / Porovnání perkutánní a otevrené radiofrekvencní ablace metastáz kolorektálního karcinomu ve FN Plzen v letech 20012015.

INTRODUCTION: Radiofrequency ablation (RFA) is a well-established method for palliative therapy of unresectable liver tumors. We use an open or percutaneous approach for the treatment of colorectal liver metastases (CLM). METHOD: Clinical data of patients undergoing percutaneous or open RFA for CLM between January 2001 and January 2015 were included in the retrospective study. We evaluated clinical factors for overall survival (OS), no evidence of disease (NED) and non-ablation in relation to tumor sizes and numbers, type of approach and type of used probes. RESULTS: 147 patients underwent RFA for CLM in this time period. Mean age was 65 years. 168 RFAs were performed in total. OS was influenced by a high number of censors. OS for the first and third years was 93.6% and 61% with no statistical differences between the percutaneous and open approach. NED was significantly shorter in patients with the percutaneous approach. NED was not influenced neither by size nor number of the lesions. A higher risk of non-ablation was observed as statistically significant in patients with percutaneous RFA. A higher, although not statistically significant, risk of non-ablation was also observed for larger metastases. Patients with percutaneous RFA showed a shorter stay in the hospital and fewer complications. CONCLUSION: RFA is an alternative approach to the treatment of unresectable CLM. In our study the open approach was associated with a lower risk of non-ablation. Percutaneous RFA showed a lower risk of complications and a shorter stay in the hospital. KEY WORDS: radiofrequency ablation percutaneous RFA colorectal liver metastases CLM palliative therapy.