Initial reports have suggested that proximity of liver tumors to the gallbladder may increase the risk for cholecystitis after radiofrequency ablation. A colon adenocarcinoma metastasis to the liver in contact with the gallbladder was successfully treated with radiofrequency ablation without subsequent cholecystitis.
KeywordsCholecystitis; Radiofrequency ablation; RFA; Gallbladder; Liver Radiofrequency ablation is quickly becoming a valuable option in the treatment of certain unresectable liver tumors. Recent studies have shown the cost effectiveness [1], relatively low complication rates [2] and short hospital stays associated with thermal ablation. Early results suggest a high rate of local control of small or isolated liver lesions [3,4]. Local application of radiofrequency to tissue can create a controlled and predictable area of coagulation necrosis with little collateral damage. Currently, pre-procedural imaging studies are used to determine the spatial relationship of the tumor to organs such as gallbladder, diaphragm, major vessels and bowel. Proximity of tumor to adjacent structures often influences the treatment plan. Although no controlled clinical studies have directly assessed the risk of cholecystitis after ablations adjacent to the gallbladder, reports of post-ablative cholecystitis have been influential in planning the treatment of liver tumors [3,4]. Some have noted that when treating tumors adjacent to the gallbladder and bowel, an open or laparoscopic technique provides the ability to mobilize adjacent vital structures away from the treatment area, thus decreasing the risk [4][5][6]. A more recent report by Chopra et al. [5], demonstrated in 8 patients who were followed for a mean of 8 months, that radiofrequency ablation near the gallbladder is feasible and appears to be safe.
Case ReportA 58-year-old man with a history of T3N1M1 adenocarcinoma of the colon presented with metastases to the liver 10 months after diagnosis and subsequent right hemicolectomy. Surgical history included a left thoracotomy for the repair of a hiatal hernia and duodenal ulcer 33 years prior to admission. The patient had no history of liver disease or alcoholism. MRI and CT of the liver revealed a small (1 cm) hypervascular enhancing lesion adjacent to the gallbladder within the right lobe of the liver (Fig. 1) and a smaller (>1 cm) lesion in the posterior aspect of the right lobe of the liver.