Choong Wook Lee1, Jin Hyoung Kim2, Hyung Jin Won1, Yong Moon Shin1, Heung Kyu Ko1, Pyo Nyun Kim1, Min-Hee Ryu3. 1. Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea. 2. Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea. Electronic address: jhkimrad@amc.seoul.kr. 3. Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea.
Abstract
PURPOSE: To evaluate the efficacy of percutaneous radiofrequency (RF) ablation for treatment of hepatic metastases from gastric adenocarcinoma. MATERIALS AND METHODS: Of 24 patients who underwent percutaneous RF ablation after gastrectomy for a hepatic metastasis from a gastric cancer during the period 2000-2013, 19 were enrolled (median age, 63 y) with 21 metastatic tumors (mean diameter, 2.3 cm). Patient overall survival (OS) and local tumor progression-free survival (PFS) outcomes were assessed and compared according to patient and tumor characteristics, including tumor size and lobar distribution. The difference in diameter between tumor and ablation zone was compared according to lobar distribution. RESULTS: The median OS after RF ablation was 20.3 months, and the median local tumor PFS was 10.4 months. The OS rate was not significantly influenced by any patient or tumor characteristics. In multivariate analysis, independent negative prognostic factors for local tumor PFS were a tumor ≥ 3 cm in diameter (hazard ratio, 10.5; 95% confidence interval, 1.8-62.5; P = .009) and a tumor located in the left lobe (hazard ratio, 9.1; 95% confidence interval, 1.3-63.5; P = .026). The difference in diameter between the tumor and ablation zone was significantly different between the right and left lobes (right 1.8 cm ± 0.6 vs left 1.1 cm ± 0.70, P = .028). CONCLUSIONS: With the appropriate selection of patients with tumors ≤ 3 cm in diameter and with the possibility of sufficient safety margins, RF ablation is a safe and feasible treatment option for hepatic metastases from gastric adenocarcinoma.
PURPOSE: To evaluate the efficacy of percutaneous radiofrequency (RF) ablation for treatment of hepatic metastases from gastric adenocarcinoma. MATERIALS AND METHODS: Of 24 patients who underwent percutaneous RF ablation after gastrectomy for a hepatic metastasis from a gastric cancer during the period 2000-2013, 19 were enrolled (median age, 63 y) with 21 metastatic tumors (mean diameter, 2.3 cm). Patient overall survival (OS) and local tumor progression-free survival (PFS) outcomes were assessed and compared according to patient and tumor characteristics, including tumor size and lobar distribution. The difference in diameter between tumor and ablation zone was compared according to lobar distribution. RESULTS: The median OS after RF ablation was 20.3 months, and the median local tumor PFS was 10.4 months. The OS rate was not significantly influenced by any patient or tumor characteristics. In multivariate analysis, independent negative prognostic factors for local tumor PFS were a tumor ≥ 3 cm in diameter (hazard ratio, 10.5; 95% confidence interval, 1.8-62.5; P = .009) and a tumor located in the left lobe (hazard ratio, 9.1; 95% confidence interval, 1.3-63.5; P = .026). The difference in diameter between the tumor and ablation zone was significantly different between the right and left lobes (right 1.8 cm ± 0.6 vs left 1.1 cm ± 0.70, P = .028). CONCLUSIONS: With the appropriate selection of patients with tumors ≤ 3 cm in diameter and with the possibility of sufficient safety margins, RF ablation is a safe and feasible treatment option for hepatic metastases from gastric adenocarcinoma.
Authors: So Jung Lee; Jin Hyoung Kim; So Yeon Kim; Hyung Jin Won; Yong Moon Shin; Pyo Nyun Kim Journal: Korean J Radiol Date: 2020-03 Impact factor: 3.500