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Prospective Study on Oncologic Cerebral Imagery Contribution by 18F-FDOPA Position Emission Tomography (PET) (IMOTEP)

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. Identifier: NCT02022800
Recruitment Status : Completed
First Posted : December 30, 2013
Last Update Posted : July 26, 2016
Information provided by (Responsible Party):
Centre Antoine Lacassagne

Brief Summary:

In standard care for patients diagnosed with a primary or secondary (metastasis) cerebral tumor, there is currently complex clinical situations in which the clinic and Magnetic Resonance Imagery (MRI) do not allow for the medical team to arrive at a conclusive diagnosis. The therapeutic proposition requires then a delay in additional follow-up of at least 3 months in order to clarify the situation, with a potential delay in diagnosis and therefore therapeutic care. The contribution of cerebral molecular imagery could allow for new additional information to be brought in or to increase the confidence index in the diagnosis in order to comfort the therapeutic collective attitude proposed in the multidisciplinary meeting (MM).

3.4-dihydroxy-6-18F-fluoro-L-phenylalanine (18F-FD0PA), dopamine precursor amino-acid, Position Emission Tomography (PET), allows for the studying in vivo of the proteic transmembrane transport in gliomatous tissue; active transport happens through a sodic-independent canal, increased in malicious transformations, and in which kinetics can give an indication regarding the development of the primary tumor.

In MRIs, tumor tissue growth after injecting the contrast product translates to a rupture in the Blood-Brain Barrier (BBB), while tumor extraction from the radiopharmaceutical is independent of the state of integrity of the BBB and whose only function is metabolic tissue activity. This method of imagery thus appears as a promising contribution to conventional imagery.

Furthermore, different to 18F-FDG (18F-2-fluoro-2-deoxy-D-glucose fluorodeoxyglucose), similar to the largely used glucose in oncologic molecular imagery, exploration of harmful glioma in 18F-FDOPA, is not compromised by background noise activity, and is almost useless in a healthy cerebral cortex, with the exception of striatal physiological fixation used as a level of reference. The best performances in terms of positive and negative predictive value were defined in the literature with a tumor/striatum threshold of 1.

According to the latest and current European recommendations, turning to PET when caring for high-level gliomas patients can be proposed in the evaluation of therapeutic responses. However, very few studies have evaluated the in-practice current clinical contributions of PET and put it into perspective with classic clinical radiological data.

Condition or disease Intervention/treatment Phase
Glioma Cerebral Metastases Other: PET 18FDOPA Not Applicable

Detailed Description:

The primary hypothesis rests on the fact that 18F-FDOPA PET imagery can modify decisions regarding the treatment of patients during oncologic neurological MDM. It's a matter of measuring the frequency in attitude and situations changes in which these changes most often occur.

Secondly, the study will have the objective, during patient follow-up, to evaluate the pertinence of these changes in decisions, as well as the usage of PET in relation to clinical situations:

  • The differential diagnosis between radionecrosis or pseudo-progression and recurrence before newly appeared contrast zones in patients diagnosed a high glioma level or metastasis and treated by radiotherapy; either with or without chemotherapy.
  • The evaluation at the end of treatment with introductory level temozolomide (TMZ) (6th cycle) after adjuvant radio-chemotherapy of a high-level primary cerebral tumor.
  • The evaluation of the response under anti-angeogenic treatment

The expected benefit of this study is an improvement in the patient's care. Indeed, the additional information provided by Position Emission Tomography (PET) could allow for healthcare professionals to more precociously test for recurrence and thus diminish the delay in therapeutic care. Conversely, the PET could allow for healthcare professionals to avoid over-treatment of patients for whom the MRI would wrongly indicate a recurrence. Furthermore, imagery by PET should bring a new level of additional information allowing for an increase in the confidence index when being diagnosed, thus comforting the collective therapeutic attitude proposed in the MM.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 85 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: Prospective Study on Oncologic Cerebral Imagery Contribution by 18F-FDOPA Position Emission Tomography (PET) in a Multidisciplinary Meeting Therapeutic Proposal When Caring for Patients Diagnosed Primary or Secondary Cerebral Tumors
Study Start Date : November 2013
Actual Primary Completion Date : November 2015
Actual Study Completion Date : June 2016

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Other: PET 18FDOPA
contribution of PET 18FDOPAimagery in high level glioma diagnosis

Primary Outcome Measures :
  1. confidence level in the therapeutic decision regarding the results from PET 18F-FDOPA imagery, in comparison with MRI alone. [ Time Frame: 1 year up to 2 years ]

Secondary Outcome Measures :
  1. Validation of the decision taken with knowledge of the results from the PET 18F-FDOPA for post-operated patients [ Time Frame: 1 year up to 2 years ]
  2. evaluation of PET 18F-FDOPA contribution according to clinical situations [ Time Frame: 1 year up to 2 years ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 85 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

Patients with a historically proven high level of glimoa or of cerebral metastases

Patients who have their files presented in a neurological oncologic CMM in one of the following situations:

  • Diagnosis doubt between radionecrosis and tumor progression
  • Evaluation at the end of the radio and chemotherapy period
  • Evaluation under anti-angiogenic 18 years or older Patients who have been informed and have signed the consent form indicated in the study Patients with insurance coverage

Exclusion Criteria:

Patients for whom having an MRI or a PET 18F-FDOPA would be contraindicated in light of any co-morbidities or allergies that it reveals

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 identifier (NCT number): NCT02022800

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Centre Antoine Lacassagne
Nice, France, 06189
Sponsors and Collaborators
Centre Antoine Lacassagne
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Principal Investigator: Jacques DARCOURT, phd Centre Antoine Lacassagne

Additional Information:
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Responsible Party: Centre Antoine Lacassagne Identifier: NCT02022800     History of Changes
Other Study ID Numbers: 2012/56
First Posted: December 30, 2013    Key Record Dates
Last Update Posted: July 26, 2016
Last Verified: November 2015
Additional relevant MeSH terms:
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Neoplasm Metastasis
Neoplastic Processes
Pathologic Processes