MR imaging-guided laser ablation of osteoid osteomas with use of optical instrument guidance at 0.23�T

Sequeiros, Roberto Blanco; Hyvönen, Pekka; Sequeiros, Alberto Blanco; Jyrkinen, Lasse; Ojala, Risto; Klemola, Rauli; Vaara, Teuvo; Tervonen, Osmo

doi:10.1007/s00330-003-1897-5

Cited by 60 publications

(31 citation statements)

References 41 publications

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“…Open MRI has also been proposed as a substitute of CT guidance [24], being able to monitor tissue response during the procedure and providing a more comfortable working space for the surgeon, without radiation exposure.…”

Section: Resultsmentioning

confidence: 99%

CT-guided radiofrequency ablation of osteoid osteoma: long-term results

et al. 2004

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The aim of the study was to assess the safety and efficacy of CT-guided percutaneous radiofrequency (RF) ablation of osteoid osteoma (OO). From 1997 to 2001, RF ablation was performed on 38 patients with OO, diagnosed clinically and by radiography, scintigraphy, contrast-enhanced MRI, and CT. Treatment was performed via percutaneous (n=29) or surgical (n=9) access, under CT guidance in all cases, with an 18-gauge straight electrode. Patients were discharged within 24 h and followed up clinically (at 1 week and every 6-12 months) and with MRI (at 6 months) and scintigraphy (after 1 year). The technical success rate was 100%. Complications occurred in two patients, consisting in local skin burns. The follow-up range was 12-66 months (mean +/- SD, 35.5+/-7.5 months). Prompt pain relief and return to normal activities were observed in 30 of 38 patients. Persistent pain occurred in eight patients; two patients refused further RF ablation and were treated surgically; RF ablation was repeated in six cases achieving successful results in five. One patient reported residual pain and is being evaluated for surgical excision. Primary and secondary clinical success rates were 78.9 (30/38 patients) and 97% (35/36 patients), respectively. CT-guided RF ablation of OO is safe and effective. Persistent lesions can be effectively re-treated. Several imaging modalities are needed for the diagnosis of OO and for the follow-up after treatment, particularly in patients with persistent symptoms.

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Section: Resultsmentioning

confidence: 99%

CT-guided radiofrequency ablation of osteoid osteoma: long-term results

et al. 2004

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“…Cryotherapy, ethanol therapy and imaging-guided excision are considered second-line therapies. Surgery remains the standard treatment in cases where histology of the lesion is in doubt or when other minimally invasive techniques are not applicable or failed [19][20][21][22][23][24][25][26][27].…”

Section: Nidusmentioning

confidence: 99%

Magnetic resonance imaging findings of osteoid osteoma of the proximal femur

et al. 2004

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Osteoid osteoma (OO) is a benign bone tumor whose main radiological finding is nidus. OO of the proximal femur can also result in non-specific findings such as hip joint effusion, perinidal bone marrow edema and soft tissue mass. Since the nidus may be difficult to identify with MR, these non-specific findings can lead to erroneous diagnosis. Therefore, MR imaging technique should be optimized in order to identify nidus. Since MR imaging has assumed increasing importance in the evaluation of disorders of the hip, radiologists must be aware of the spectrum of findings of OO of the proximal femur. The aim of this pictorial review is to show the MR imaging findings of intra-articular and extra-articular OO of the proximal femur.

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“…Another promising technique is interstitial laser ablation (ILA). ILA can be performed using magnetic resonance imaging (MRI) guidance, thus preventing radiation exposure of the predominantly adolescent patients (12,13). Minimally invasive thermal therapies have the potential to be cost-effective compared with open surgery (14).…”

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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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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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MR imaging-guided laser ablation of osteoid osteomas with use of optical instrument guidance at 0.23�T

Cited by 60 publications

References 41 publications

CT-guided radiofrequency ablation of osteoid osteoma: long-term results

CT-guided radiofrequency ablation of osteoid osteoma: long-term results

Magnetic resonance imaging findings of osteoid osteoma of the proximal femur

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

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