We're building a better ClinicalTrials.gov. Check it out and tell us what you think!
ClinicalTrials.gov Menu

Non-invasive Focal Therapy for Osteoid Osteoma

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT02302651
Recruitment Status : Unknown
Verified November 2014 by Alessandro Napoli, University of Roma La Sapienza.
Recruitment status was:  Recruiting
First Posted : November 27, 2014
Last Update Posted : November 27, 2014
Information provided by (Responsible Party):
Alessandro Napoli, University of Roma La Sapienza

Brief Summary:
Non-invasive treatment of Osteoid osteoma using MRI guided high-intensity focused ultrasound. This study is designed as an intention-to-treat using a totally non-invasive approach for pain reduction, quality of life improvement and long-term bone restoration. Procedure is performed in a single session using limited amount of acoustic energy to target the osteoid nidus. Treatment will be performed under anesthesia (peripheral or general according to age and lesion position).

Condition or disease Intervention/treatment Phase
Osteoma, Osteoid Device: MR guided High Intensity focused ultrasound Phase 2 Phase 3

Detailed Description:

An osteoid osteoma is a benign, painful musculoskeletal tumor that usually occurs in young males. The standard of care in the United States is computed tomography (CT)-guided radiofrequency ablation, a minimally invasive percutaneous procedure, with clinical success rates ranging between 85% and 98%.

Percutaneous or surgical therapy can lead to non-negligible side-effects and limited efficacy for pediatric population or young adults with osteoid osteoma. We investigate whether selective focal ablation of osteoid lesions can reduce this treatment burden without compromising long-term clinical efficacy.

Treatments will be performed using a 3.0-T MR unit (Discovery MR 750; GE Medical Systems, Milwaukee,Wis) featuring a Conformité Européenne-approved ExAblate MR-guided focused ultrasound system (InSightec,Tirat-Carmel, Israel) in which the ultrasound transducer is housed in the patient table. Alignment between the lesion and the transducer will be obtained in each patient by using a moistened gel pad and degassed water for acoustic coupling. This approach avoided air- skin interfaces, which can cause energy reflection and skin burns. After patient positioning, the lesion is localized with MR for treatment by using variably orientated non enhanced T1- and T2-weighted acquisitions. In general, an ideal 90° incidental angle between the planned focused ultrasound path and the lesion, relative to the bone long axis, is obtained or at least approximated. The shortest skin-lesion distance is selected for the beam pathway. Care will be taken to avoid multiple interfaces (skin, muscle, fasciae) as much as possible so as to minimize deflection of the focused ultrasound beam. Each lesion will be manually segmented by the operator to precisely delineate the nidus, skin surface, and cortical surface of the bone. Sensitive areas surrounding the target volumes will also be drawn to limit the energy and prevent unwanted thermal damage. The treatment plan is than calculated automatically by the ExAblate software according to previously acquired parameters, including the energy (in joules), the interval between two sonications, the sonication duration, and the spot size, which are modifiable by the operator. Thereafter, a low-energy sonication test will be performed to confirm the path and correct direction of the ultrasound beam into the target area and to confirm the planned energy dose and the effective dose deployed to the lesion.

The increase in tissue temperature is evaluated by using real-time MR thermometry of phase-difference fast spoiled gradient-echo sequences (proton resonant frequency shift method). The sequences are acquired to provide temperature-dependent images and real-time mapping of the thermal dose on a preferred imaging plane. The proton resonant frequency shift method starts simultaneously with each sonication. Similar to other treatments of bone lesions that use MR-guided focused ultrasound, the temperature increase is determined on the adjacent periskeletal tissue. In fact, proton resonant frequency sequences cannot effectively measure the temperature on the bone surface because of the absence of moving protons in the cortical zone. Thus, MR thermometry reveals a temperature increase, which propagates by conductive processes from the bone to the immediately adjacent soft tissues that respond linearly to an increase in bone temperature, thereby allowing an accurate measure of heating. Portions of periosteum and adjacent tumor that are not fully ablated can be re-treated if deemed necessary. The critical temperature threshold for ablation is set at 65°C in the soft tissues adjacent to the targeted bone structures. Postprocedural care includes evaluation of possible skin burns, monitoring of vital signs for 2 hours after treatment in the MR department, and administration of analgesic and/or antiemetic drugs if requested. Treatment-related adverse events will be recorded as minor or major on the basis of medical severity, additional treatment, and long-term consequences for patients. Treatment will be performed on an outpatient basis in the patients who receive only local and peripheral anesthesia; the patient who receives general anesthesia is usually hospitalized for 24 hours after treatment.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 60 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Treatment of Osteoid Osteoma With MR Guided High Intensity Focused Ultrasound
Study Start Date : June 2010
Estimated Primary Completion Date : June 2015
Estimated Study Completion Date : December 2015

Arm Intervention/treatment
Osteoid Osteoma
MR guided High Intensity focused ultrasound
Device: MR guided High Intensity focused ultrasound
High Intensity Focused Ultrasound is a totally non-invasive procedure that can destroy tumors transcutaneously; safety and efficacy profile are dramatically increased by the MRI guidance

Primary Outcome Measures :
  1. Safety - Adverse Events (serious and otherwise) [ Time Frame: 1 year ]
    to assess complications

  2. Efficacy (Symptoms reduction) [ Time Frame: 4 years ]
    Symptoms reduction

Secondary Outcome Measures :
  1. nidus vascularization (correlation between nidus vascularization reduction and symptoms relieve) [ Time Frame: 4 years ]
    correlation between nidus vascularization reduction and symptoms relieve

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   3 Years to 80 Years   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • clinical and imaging diagnosis of osteoid osteoma
  • painful non-vertebral location

Exclusion Criteria:

  • general contraindication to MRI
  • vertebral location of the lesion
  • claustrophobia and prior surgery or RFA are not an absolute exclusion criterion

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02302651

Layout table for location contacts
Contact: Alessandro Napoli, MD, PhD 3357718114 alessandro.napoli@uniroma1.it

Layout table for location information
Alessandro Napoli Recruiting
Rome, Italy, 00100
Contact: Alessandro Napoli    +393357718114    alessandro.napoli@uniroma1.it   
Principal Investigator: Alessandro Napoli, MD, PhD         
Sponsors and Collaborators
University of Roma La Sapienza
Layout table for investigator information
Principal Investigator: Alessandro napoli, MD, PhD Sapienza University of Rome, Policlinico Umberto I Hospital
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Layout table for additonal information
Responsible Party: Alessandro Napoli, MD, PhD, University of Roma La Sapienza
ClinicalTrials.gov Identifier: NCT02302651    
Other Study ID Numbers: OO-MC-MRGFUS-002
First Posted: November 27, 2014    Key Record Dates
Last Update Posted: November 27, 2014
Last Verified: November 2014
Keywords provided by Alessandro Napoli, University of Roma La Sapienza:
high intensity focused ultrasound
osteoid osteoma
bone tumor
Additional relevant MeSH terms:
Layout table for MeSH terms
Osteoma, Osteoid
Neoplasms, Bone Tissue
Neoplasms, Connective Tissue
Neoplasms, Connective and Soft Tissue
Neoplasms by Histologic Type