CT-guided radiofrequency ablation of osteoid osteoma and its postoperative imaging
10.3760/cma.j.issn.0254-1424.2017.03.014
- VernacularTitle:CT引导下经皮穿刺射频消融术治疗骨样骨瘤及术后影像学评价
- Author:
Yutao WANG
;
Jianhua WANG
;
Zhihai YU
;
Haitao WANG
;
Changjing ZUO
;
Jianming TIAN
- Keywords:
Osteomas;
Catheter ablation;
Punctures;
Diagnostic imaging
- From:
Chinese Journal of Physical Medicine and Rehabilitation
2017;39(3):214-217
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the clinical value of CT-guided radiofrequency ablation (RFA) and imaging follow-up for patients with osteoid osteoma.Methods Thirty-seven patients with osteoid osteomas were selected.Their tumors occurred mainly in the femur and tibia (16/37,13/37) with local pain aggravated at night in 32 of the cases.They were treated with CT-guided RFA.One week,1 month and 3 months after the surgery,CT and MRI examinations were conducted to observe the density of the ablated area,any density (signal) changes and the recovery of adjacent tissues.A visual analogue scale (VAS) was used to assess the perceived pain of the patients.Results All of the patients went through the operation successfully and resumed unrestricted normal activity within 2 d to 1 week without complications.Field CT showed a low density of bone defects one month after the ablation,with the bone defect narrowing and peripheral thickened reactive bone thinning slightly 2 months later.One week after the RFA treatment the MRI's T2WI signal was lower than before the treatment and the T1WI signal was low.One month after the RFA the T2WI high signal of 20 of the patients (54.1％) had decreased and the T1WI low signal had narrowed compared to one week after the operation.The signals of the other 17 cases (45.9％) had returned to normal.Three months after the operation the T2WI high signal of 10 of the 20 patients (27％) had decreased further and their T1 WI low signal had also narrowed further compared to one month after the operation,with a total of 27 then normal.After the operation,the average VAS score decreased significantly compared to before the operation.Conclusion CT-guided RFA is a safe and effective minimally invasive method for the treatment of osteoid osteoma.Dynamic imaging is very useful for assessing the therapeutic effect in the short term.
