Neural Stem Cell Preserving Brain Radiation Therapy & Stereotactic Radiosurgery in Patients With 1-6 Brain Metastases

Study Overview
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Brief Summary
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For patients with 1-6 intraparenchymal brain metastases from various primary histologies (except for melanoma), stereotactic radiosurgery (administered upfront or concurrently) or complete surgical resection with neural stem cell (NSC)-preserving whole-brain radiotherapy (WBRT) results in improved neurocognitive profile over standard WBRT. The goal of this study is to assess feasibility of this treatment approach.

Detailed Description
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Cancer patients (except patients with melanoma) with 1-6 brain metastases are randomized to receive standard whole brain radiation therapy or whole brain radiation therapy in a neural stem cell-preserving manner.

Official Title
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A Study of Neural Stem Cell (NSC) Preserving Whole Brain Radiation Therapy (WBRT) and Stereotactic Radiosurgery in Patients With 1-6 Brain Metastases

Conditions
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Lung Cancer, Breast Cancer, Prostate Cancer

Intervention / Treatment
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* Radiation: Radiotherapy


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Histologically confirmed non-melanoma primary malignancy with 1-6 intraparenchymal brain metastases (or small cell lung cancer being considered for prophylactic brain irradiation (PBI) with no demonstrable intracranial lesions). A diagnostic contrast-enhanced magnetic resonance imaging (MRI) demonstrating the presence of 1-6 brain metastases performed within 4 weeks of registration. Note: If small cell lung cancer primary and patient being considered for PBI, MRI must demonstrate no intracranial lesions. Patients with totally resected intraparenchymal brain metastases; not all lesions need be resected if all other criteria are satisfied (no more than 6 total lesions) The contrast-enhancing intraparenchymal brain tumor must be well circumscribed and must have maximum diameter of no more than 4 cm in any dimension on the enhanced scan. If multiple lesions are present and one lesion is at the maximum diameter, the other(s) must not exceed 3.0 cm in maximum diameter. Metastatic lesions must be distributed peripherally, that is, at least 0.5 cm lateral (outside) of the lateral ventricles and/or hippocampus bilaterally. Posterior fossa metastatic lesions are allowed in the study. Age 18 years or older. Zubrod performance score 0-1. Neurologic function score 0, 1, or 2. Patients receiving glucocorticoids should be tapered to the lowest possible dose, or altogether, as judged by the participating physician. If glucocorticoid dose is adjusted or given for the first time, patient must remain on stable dose of glucocorticoids for at least 3 days prior to initial Neurocognitive Assessment Protocol (NAP), CT and MR imaging. Exclusion Criteria: Major medical illnesses or psychiatric impairments, which in the investigators opinion will prevent administration or completion of the protocol therapy and/or interfere with follow-up. For patients who have undergone subtotal resection, residual disease must be 4 cm in maximum diameter. Inability to obtain histologic proof of primary malignancy. Patients with leptomeningial metastases documented by MRI or cerebral spinal fluid (CSF) evaluation.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: 1<br>Standard Whole Brain Radiotherapy | Radiation: Radiotherapy<br>* Treatments are delivered through parallel opposed or 5 degree RAO/LAO fields that cover the entire cranial contents. There should be beam fall-f of at least 1 cm. The eyes must be excluded from the beam either by field arrangement or shielding.<br>|
| Experimental: 2<br>Neural Stem Cell-Preserving Whole Brain Radiotherapy | Radiation: Radiotherapy<br>* Treatments are delivered through parallel opposed or 5 degree RAO/LAO fields that cover the entire cranial contents. There should be beam fall-f of at least 1 cm. The eyes must be excluded from the beam either by field arrangement or shielding.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Increase in the Bi-dimensional Tumor Area for Any of the Tracked Brain Metastases or the Appearance of Any New Brain Metastases on a Follow-up MRI. | Brain metastases bi-dimensional area | 12 months post RT | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Increase in the Bi-dimensional Tumor Area for Any of the Tracked Brain Metastases or the Appearance of Any New Brain Metastases on a Follow-up MRI. | Increase in the bi-dimensional tumor area for any of the tracked brain metastases or the appearance of any new brain metastases on a follow-up MRI. | 12 months after end of radiation therapy | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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whole brain radiotherapy, neural stem cell, brain metastases, radiosurgery