Imaging-guided percutaneous radiofrequency ablation of solid renal masses: Techniques and outcomes of 38 treatment sessions in 32 consecutive patients

被引:194
作者
Mayo-Smith, WW [1 ]
Dupuy, DE [1 ]
Parikh, PM [1 ]
Pezzullo, JA [1 ]
Cronan, JJ [1 ]
机构
[1] Rhode Isl Hosp, Dept Diagnost Imaging, Brown Med Sch, Providence, RI 02903 USA
关键词
D O I
10.2214/ajr.180.6.1801503
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Objective. The purpose of this study was to describe the treatment techniques and results of 38 consecutive imaging-guided percutaneous radiofrequency ablations of solid renal masses performed in 32 patients. Materials and Methods. Solid renal masses in 32 patients underwent 38 treatment sessions using imaging-guided percutaneous radiofrequency ablation. During 36 sessions, radiofrequency ablation was performed using CT guidance, and two, using sonographic guidance. The average patient age was 76 years (range, 52-87 years), and the average renal mass size was 2.6 cm (range, 1-5 cm). The average number of radiofrequency treatments per solid mass at each session was 2.4 (range, 1-6 treatments), and the average time per treatment was 9.2 min (range, 3-14 min). A single electrode was used in 12 sessions, and a cluster electrode was used in 26 sessions. The average follow-up time was 9 months (range, 1-36 months). Results. Twenty-six of 32 patients had successful treatment of the solid renal mass using percutaneous imaging-guided radiofrequency ablation after one treatment session. Successful treatment was defined as lack of enhancement of the treated region on follow-up CT. Six of 32 patients had residual enhancing tissue after the first treatment session and returned for a second session. Five of these six retreatments were successful. Masses requiring a second treatment session were significantly larger than masses treated in a single session (3.5 vs 2.4 cm, respectively; p=0.0013). Two patients had perinephric hematomas (which did not require transfusion), and one patient developed a 5-mm skin metastasis at the electrode insertion site, which was resected without recurrence. Conclusion. Percutaneous imaging-guided radiofrequency ablation shows promise in the treatment of solid renal malignancies.
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收藏
页码:1503 / 1508
页数:6
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