Evaluating Tumor Pseudoprogression With FLT-PET and MRI
A Pilot Study to Evaluate Tumor Pseudoprogression With FLT-PET and MRI
A standard treatment for glioblastoma is a combination of radiation and the drug temozolomide. This combination sometimes causing swelling (inflammation) of the brain tissue. When standard monitoring with MRI or CT scans is done within a few months of finishing treatment, it may be hard to tell if the scans are showing post-treatment brain inflammation or tumor growth and worsening of disease. Currently the only way to definitively distinguish inflammation from tumor growth is biopsy.
However, biopsy is an invasive procedure that is associated with risks. Having a non-invasive method to distinguish post-treatment inflammation from tumor growth can help improve care for patients with glioma.
For the PET scans in this research study, the investigators are using a radioactive substance called FLT (3'-deoxy-3'-[F-18] fluorothymidine), instead of the standard substance FDG (fluorodeoxyglucose). FLT gets absorbed by cancer cells but not by areas of inflammation. Because of that FLT may be better than FDG in differentiating cancer cells from inflammation.
An MRI scan will also be done at the same time as each of the 2 FLT-PET scans done for this research study. The two MRI scans performed will also help give more information about the patient's tumor that is not routinely provided with a routine clinical scan, such as blood flow through the tumor or metabolic activity in the tumor. The information from these special MRI scans may provide more information about the blood supply to the tumor and how this changes in response to treatment. In addition, the MRI scans along with the FLT-PET scans may help how to distinguish inflammation due to radiation therapy from tumor growth.
Descripción general del estudio
Descripción detallada
If you are eligible to participate in this study you will have a pre-treatment FLT-PET scan within 7 days before starting treatment with radiation and temozolomide.
Two intravenous catheters (IVs) will be placed for each scan. One IV will be used to inject the FLT for the PET scan and the contrast agent for the MRI scan. The second IV will be used to draw blood for research tests. The PET scan will take about 2 hours. The MRI scan will take about 60-75 minutes. They will be done simultaneously.
About 4 weeks after you finish radiation therapy you will have a second FLT-PET scan and MRI scan.
Tipo de estudio
Inscripción (Actual)
Fase
- Fase temprana 1
Contactos y Ubicaciones
Ubicaciones de estudio
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Massachusetts
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Boston, Massachusetts, Estados Unidos, 02114
- Massachusetts General Hospital
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Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Descripción
Inclusion Criteria:
- Histologically confirmed newly diagnosed glioblastoma
- Planned treatment for glioblastoma is standard radiation and temozolomide
- Measurable disease
- Life expectancy >/= 12 weeks
- Lab values must be within limits specified in protocol
- Able to undergo MRI and PET scans
- On stable dose of steroids for 5 days prior to each MRI scan
Exclusion Criteria:
- Chemotherapy or radiotherapy within 4 weeks (6 weeks for nitrosoureas or mitomycin C) prior to entering study or not recovered from adverse events from prior therapy
- Receiving any other study agents to treat tumor
- History of allergic reactions to compounds of similar chemical or biologic composition to FLT
- Uncontrolled intercurrent illness
- Pregnant or nursing
- HIV-positive
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Diagnóstico
- Asignación: No aleatorizado
- Modelo Intervencionista: Asignación de un solo grupo
- Enmascaramiento: Ninguno (etiqueta abierta)
¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
|
Primary Outcome Measure
Periodo de tiempo: 2 years
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To determine if elevated FLT PET uptake 4 weeks after completion of chemoradiation is associated with early tumor growth rather than treatment effect in patients with newly diagnosed glioblastome treated with standard chemoradiation.
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2 years
|
Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
|
Secondary Outcome Measure
Periodo de tiempo: 2 years
|
To clarify the impact of radiation and temozolomide chemotherapy on tumor cell proliferation.
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2 years
|
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Secondary Outcome Measure
Periodo de tiempo: 2 years
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To compare blood-derived kinetic parameters of tumor cell proliferation rate with image derived parameters of proliferation.
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2 years
|
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Secondary Outcome Measure
Periodo de tiempo: 2 years
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To examine the association of FLT uptake and MRI parameters, specifically contrast enhancement, perfusion, permeability, diffusion, and MR Spectroscopy.
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2 years
|
Colaboradores e Investigadores
Patrocinador
Colaboradores
Investigadores
- Investigador principal: Elizabeth Gerstner, MD, Massachusetts General Hospital
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio
Finalización primaria (Actual)
Finalización del estudio (Actual)
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Estimar)
Actualizaciones de registros de estudio
Última actualización publicada (Estimar)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- 10-008
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