Clinical evaluation of ultrasound- guided percutaneous microwave ablation of splenic tumors
10.3969/j.issn.1673-4254.2015.03.04
- VernacularTitle:超声引导经皮微波消融脾肿瘤的疗效分析
- Author:
Jie YU
1
;
Ping LIANG
;
Xiaoling YU
;
Zhigang CHENG
;
Zhiyu HAN
;
Mengjuan MU
;
Yanmei LIU
Author Information
1. 解放军总医院介入超声科
- Keywords:
microwave ablation;
ultrasound;
spleen;
tumor
- From:
Journal of Southern Medical University
2015;(3):333-337
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the feasibility, safety and efficacy of ultrasound-guided percutaneous microwave ablation (MWA) of splenic tumors. Methods Seven patients with 8 pathologically confirmed splenic tumors (including 2 metastases from the ovary and 4 from the lung, gastric adenocarcinoma, hepatocellular carcinoma, or rectal carcinoma; 1 hemangioma and 1 inflammatory pseudotumor) with sizes ranging from 1.3 to 6.2 cm (mean 3.1±1.9 cm) were treated with MWA. A cooled shaft needle antenna was percutaneously inserted into the tumor under ultrasound guidance. A thermocouple was placed about 0.5 cm away from the tumor to monitor the temperature in real time during the ablation. The microwave emitting power was set at 50-60 W. The treatment efficacy was assessed by contrast-enhanced imaging at 1, 3 and 6 months following the procedure, and every 6 months thereafter. Results All the tumors were completely ablated in a single session and no complications occurred. No local tumor progression was observed during a median follow up time of 13 months (4 to 92 months). The ablation zone, well defined on contrast-enhanced imaging, was gradually reduced with time. A new metastatic lesion was detected in the spleen at 11 months after the ablation in a ovarian carcinoma patient and was successfully treated by a second MWA. The post-ablation survival of the patients with splenic metastasis was 13 months (range 4 to 92 months). No complications other than fever and abdominal pain were observed in these patients. Conclusion Ultrasound- guided percutaneous MWA is a safe and effective minimally-invasive technique for treatment of splenic tumors in selected patients.
