Radiofrequency ablation for non-spinal osteoid osteomas in 557 patients

Rimondi, Eugenio; Mavrogenis, Andreas F.; Rossi, Giuseppe; Ciminari, Rosanna; Malaguti, Cristina; Tranfaglia, Cristina; Vanel, D.; Ruggieri, Pietro

doi:10.1007/s00330-011-2240-1

Cited by 84 publications

(72 citation statements)

References 29 publications

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“…The more recent studies report comparable primary technique effectiveness of 85%-100% (32)(33)(34)(35). One factor leading to the high success and low relapse rate in our study might be the longer ablation time compared with some previous studies (10), which is corroborated by the data of other studies with similar findings (24).…”

Section: Discussionsupporting

confidence: 89%

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CT-guided radiofrequency ablation of osteoid osteoma: correlation of clinical outcome and imaging features

Rehnitz¹,

Sprengel²,

Lehner³

et al. 2013

Diagn Interv Radiol

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ORIGINAL ARTICLE PURPOSE We aimed to retrospectively evaluate the computed tomography (CT) and magnetic resonance imaging (MRI) findings of patients with osteoid osteoma treated with CT-guided radiofrequency ablation (RFA) along with the clinical outcome and long-term success. MATERIALS AND METHODSSeventy-three CT-guided RFA procedures were performed in 72 patients. The long-term success was assessed using a questionnaire including several visual analog scale scores. The CT evaluation included pre-and immediate postprocedural imaging of all 72 patients, and MRI was performed in 18 patients with follow-up imaging (mean, 3.4±2.2 months). The evaluation criteria included nidus morphology and a correlation with markers of clinical success. RESULTSThe primary technique effectiveness rate was 71/72 (99%). One relapse was successfully retreated, leading to a secondary technique effectiveness rate of 72/72 (100%). The longterm follow-up (mean, 51.2±31.2 months; range, 3-109 months) revealed a highly significant reduction of all assessed limitation scores (P < 0.001). The CT morphology was typical in all cases and did not change during the short-term follow-up. The follow-up MRI patterns varied considerably, including persistent nidus contrast enhancement in one-third (6/18) and persistent marrow edema in half (9/18) of the patients. None of the investigated MRI and CT patterns correlated with the clinical outcome. CONCLUSIONThe long-term outcome of CT-guided RFA of osteoid osteoma is excellent. There is no correlation of the CT and MRI patterns with the clinical outcome. Thus, the treatment decisions should not be solely based on the imaging findings. Investigators should also be aware of the variety of imaging patterns after RFA.

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Section: Discussionsupporting

confidence: 89%

“…General information about the RFA technique is provided in previous studies (7)(8)(9)(20)(21)(22)(23)(24). The specific technical considerations used in our study are as follows: The procedure was performed under general (70 patients) or spinal (two patients) anesthesia.…”

Section: Rfa Techniquementioning

confidence: 99%

CT-guided radiofrequency ablation of osteoid osteoma: correlation of clinical outcome and imaging features

Rehnitz¹,

Sprengel²,

Lehner³

et al. 2013

Diagn Interv Radiol

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“…Although OO is benign and spontaneous remission occasionally occurs, an intervention for definitive relief of pain is sometimes required [2]. Among others techniques [3], radiofrequency ablation (RFA) is a minimally invasive technique which allows thermal destruction of the OO [4][5][6]. The most common location of OO is in the long bones [5].…”

Section: Introductionmentioning

confidence: 99%

“…Among others techniques [3], radiofrequency ablation (RFA) is a minimally invasive technique which allows thermal destruction of the OO [4][5][6]. The most common location of OO is in the long bones [5]. Most OOs are cortical and macroscopically consist of a nidus of active bone surrounded by a reactive zone.…”

Section: Introductionmentioning

confidence: 99%

Computer modelling of RF ablation in cortical osteoid osteoma: Assessment of the insulating effect of the reactive zone

Irastorza

Trujillo

Martel

et al. 2016

International Journal of Hyperthermia

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2 AbstractPurpose: To study by computer simulations the insulating role of the reactive zone surrounding a cortical osteoid osteoma (OO) in terms of electrical and thermal performance during radiofrequency ablation (RFA). Material and methods:We modeled a cortical OO consisting of a nidus (10 mm diameter) enclosed by a reactive zone. The OO is near a layer of cortical bone 1.5 mm thick. Trabecular bone partially surrounds the OO and there is muscle around the cortical bone layer. We modeled RF ablations with a non-cooled-tip 17G needle electrode (300 s duration and 90ºC target temperature). Sensitivity analyses were conducted assuming a reactive zone electrical conductivity value (σ rz ) within the limits of the cortical and trabecular bone, i.e. 0.02 S/m and 0.087 S/m, respectively. In this way we were really modeling the different degrees of osteosclerosis associated with the reactive zone. Results:The presence of the reactive zone drastically reduces the maximum temperature reached outside it. The temperature drop is proportional to the thickness of the reactive zone: from 68ºC when it is absent to 44ºC when it is 7.5 mm thick. Higher nidus conductivity values (σ n ) implied higher temperatures, while lower temperatures meant higher σ rz values. Changing σ rz from 0.02 S/m to 0.087 S/m reduced lesion diameters from 2.4 cm to 1.8 cm. Conclusions:The computer results suggest that the reactive zone plays the role of insulator in terms of reducing the temperature in the surrounding area.

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“…The effectiveness of RF ablation of OOs localized in the extremities and pelvis has been proven by many studies. [16][17][18][19] Percutaneous RF ablation for the treatment of spinal OOs is not widely used, probably owing to the potential danger to the adjacent neural and vascular elements. In recent years, however, some clinical studies reported good results in the management of spinal OOs using CT-guided RF ablation.…”

Section: Advances In Knowledgementioning

confidence: 99%

Percutaneous radiofrequency ablation of spinal osteoid osteoma under CT guidance

Morassi

Kokkinis²,

Evangelopoulos³

et al. 2014

BJR

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Objective: Osteoid osteoma (OO) accounts for approximately 10-12% of all benign bone tumours and 3% of all bone tumours. Spinal involvement appears in 10-25% of all cases. The purpose of this study was to evaluate the safety and efficacy of CT-guided radiofrequency (RF) ablation in the treatment of spinal OOs and report our experience. Methods: 13 patients suffering from spinal OO and treated at the authors' institution using CT-guided RF ablation were retrospectively evaluated. The RF probe was introduced through a 11-G Jamshidi® needle, and the lesion was heated at 90°C for 6 min.

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Radiofrequency ablation for non-spinal osteoid osteomas in 557 patients

Abstract: Electrode parameters, duration of ablation, morphology and size of osteoid osteomas are important for RFA. The above modifications are recommended for improved outcome.

Cited by 84 publications

References 29 publications

CT-guided radiofrequency ablation of osteoid osteoma: correlation of clinical outcome and imaging features

CT-guided radiofrequency ablation of osteoid osteoma: correlation of clinical outcome and imaging features

Computer modelling of RF ablation in cortical osteoid osteoma: Assessment of the insulating effect of the reactive zone

Percutaneous radiofrequency ablation of spinal osteoid osteoma under CT guidance

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