Published in:
01-11-2013 | Interventional
Mid-term clinical efficacy of a volumetric magnetic resonance-guided high-intensity focused ultrasound technique for treatment of symptomatic uterine fibroids
Authors:
Marlijne E. Ikink, Marianne J. Voogt, Helena M. Verkooijen, Paul N. M. Lohle, Karlijn J. Schweitzer, Arie Franx, Willem P. Th. M. Mali, Lambertus W. Bartels, Maurice A. A. J. van den Bosch
Published in:
European Radiology
|
Issue 11/2013
Login to get access
Abstract
Objective
To assess the mid-term efficacy of magnetic resonance-guided high-intensity focused ultrasound (MR-HIFU) using a volumetric ablation technique for treating uterine fibroids.
Methods
Forty-six premenopausal women with 58 symptomatic uterine fibroids were prospectively included for MR-HIFU. After treatment, CE-MRI allowed measurement of the non-perfused volume (NPV) ratio, defined as the non-enhancing part of the fibroid divided by fibroid volume. Clinical symptoms and fibroid size on T2W-MRI were quantified at 3 and 6 months’ follow-up. The primary endpoint was a clinically relevant improvement in the transformed Symptom Severity Score (tSSS) of the Uterine Fibroid Symptom and Quality of Life questionnaire, defined as a 10-point reduction.
Results
Volumetric ablation resulted in a mean NPV ratio of 0.40 ± 0.22, with a mean NPV of 141 ± 135 cm3. Mean fibroid volume was 353 ± 269 cm3 at baseline, which decreased to 271 ± 225 cm3 at 6 months (P < 0.001), corresponding to a mean volume reduction of 29 % ± 20 %. Clinical follow-up showed that 54 % (25/46) of the patients reported a more than 10-point reduction in the tSSS. Mean tSSS improved from 50.9 ± 18.4 at baseline to 34.7 ± 20.2 after 6 months (P < 0.001).
Conclusion
Volumetric MR-HIFU is effective for patients with symptomatic uterine fibroids. At 6 months, significant symptom improvement was observed in 54 % of patients.
Key Points
• Volumetric MR-guided high-intensity focused ultrasound is a novel ablation technique for leiomyomatosis.
• We prospectively evaluated the outcome of volumetric MR-HIFU ablation for symptomatic fibroids.
• This study showed that volumetric MR-HIFU results in an effective treatment.
• A randomised controlled trial would set this technique in an appropriate context.