A Neurocognitive Study in Patients With Brain Oligometastases Receiving Hypofractionated SRT

Study Purpose

Background: For newly-diagnosed patients with brain metastasis, conventional whole-brain radiation therapy (WBRT) might still remain a common palliative management even for those with brain oligometastases. However, WBRT-related late consequences, particularly a decline in neurocognitive functions (NCFs), are a major concern. Actually, WBRT-related neurocognitive dysfunction is usually characterized as deterioration involving learning and memory, in which the extremely radiosensitive hippocampus indeed plays a critical role. In order to postpone or mitigate the effect of conventional WBRT-induced neurocognitive impairments, there have been some strategies and options in clinical practice. Among them, the technique of highly precise and accurate stereotactic radiosurgery or stereotactic radiotherapy (i.e., hypofractionated stereotactic radiotherapy, HS-SRT) might have been widely administered in irradiating purely focal metastatic foci in cancer patients with a limited number of brain metastases. Methods: Newly-diagnosed cancer patients harboring 1-3 brain metastatic lesions are eligible if they are still in a fair/good performance status. All recruited patients should receive baseline brain MRI examination and pre-radiotherapy neurocognitive assessment. Sticking to the principles of stereotactic radiosurgery/radiotherapy (SRS/SRT), treatment planning will be designed via the technique of volumetric-modulated arc therapy (VMAT) to achieve both satisfactory in-field local control (but assuring of hippocampal avoidance) and a tolerably low incidence of radiation necrosis, a course of hypofractionated stereotactic radiotherapy (HF-SRT) is delivered within 2 weeks with a cumulative dose of 3000

  • - 3500 cGy in 5 fractions.
Accordingly, a battery of neuropsychological measures, which includes 7 standardized neuropsychological tests (e.g., executive functions, verbal and non-verbal memory, working memory, and psychomotor speed), is used to evaluate neurocognitive functions for our registered patients. The primary outcome measure is cognitive-deterioration-free survival, which is defined mainly as the time from enrollment to a NCF decline of exceeding than 1 SD away from the baseline involving at least one of the assessed NCF tests. Additionally, patients who expire before 6 months or are alive but fail to undergo all the neurocognitive testing administered would also be defined as suffering from cognitive deterioration. There are quite a few secondary endpoints of interest, including the patterns of (CNS) failure, actual local control rates, time to (CNS) progression, and cumulative incidence of radiation necrosis. Expected results: This prospective neurocognitive study aims to examine thoroughly the impact of the technique of highly focal brain irradiation administered with a course of hypofractionated SRT delivered to brain metastatic lesions merely (but sparing hippocampal structures), on neurocognitive performance, time to (CNS) progression, and patterns of (CNS) failure, in patients with brain oligometastases and a fair/good performance status. It is anticipated that (in-field) local control would be durable and that neurocognitive outcomes would also be maintained favorably. Moreover, we also expect that the patterns of (CNS) failure and the individual time to progression will be clearly demonstrated in this prospective longitudinal neurocognitive study.

Recruitment Criteria

Accepts Healthy Volunteers

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Study Type

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Eligible Ages 18 Years - 84 Years
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

  • - Patients with pathologically-confirmed non-hematopoietic malignancy who are referred for postoperative adjuvant or therapeutic hypofractionated stereotactic radiotherapy (HF-SRT).
  • - A Fair/good performance status no worse than Eastern Cooperative Group (ECOG) of 2 or an acceptable performance status of Karnofsky Score (KPS) at least 70.
  • - The number and extent of brain metastatic lesions should be no more than three metastatic foci with a greatest diameter no more than 4 cm shown on pre-radiotherapy MRI; namely, that is the clinical setting of oligometastatic brain disease or brain oligometastases.

Exclusion Criteria:

  • - Patients with their primary cancer arising from hematological malignancies (i.e., malignant lymphomas, leukemia), germ cell tumors, or malignant meningiomas.
  • - Patients with MRI-identified metastasis within 5 mm peri-hippocampally.
  • - Patients with metastasis involving the brain stem.
  • - Clinical suspicion of leptomeningeal spreading.
- History of prior radiotherapy including stereotactic radiosurgery delivered to brain/head region for any reasons

Trial Details

Trial ID:

This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.


Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Lead Sponsor

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Chang Gung Memorial Hospital
Principal Investigator

The person who is responsible for the scientific and technical direction of the entire clinical study.

Principal Investigator Affiliation N/A
Agency Class

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Overall Status Recruiting
Countries Taiwan

The disease, disorder, syndrome, illness, or injury that is being studied.

Brain Metastases, Adult
Arms & Interventions


: Hypofractionated Stereotactic Radiotherapy (HF-SRT)

A prospective cohort study addressing both neurocognitive outcome measures and oncological endpoints will be carried out for treating newly-diagnosed brain oligometastases with a pre-defined course of hypofractionated stereotactic radiotherapy (HF-SRT) in cancer patients with a fair/satisfactory performance status. Either a limited number of brain metastases or oligometastatic brain disease refers to that the number of brain metastatic lesions (both post-resected and intact) at enrollment should be limited to three or fewer and that the greatest diameter of any metastatic lesion (either a tumor bed post-surgical resection or an intact brain metastasis) should be no more than 4 cm.


Radiation: - Hypofractionated Stereotactic Radiotherapy

A course of hypofractionated stereotactic radiotherapy (HF-SRT) is delivered within 2 weeks with a cumulative dose of 3000 - 3500 cGy in 5 fractions.

Contact a Trial Team

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International Sites

Chang Gung Memorial Hospital, Taoyuan, Taiwan




Chang Gung Memorial Hospital

Taoyuan, , 333

Site Contact

Shinn-Yn Lin, M.D.


+886-33281200 #7172

Chang Gung Memorial Hospital, Taoyuan, Taiwan




Chang Gung Memorial Hospital

Taoyuan, , 333

Site Contact

Shinn-Yn Lin, M.D.


886-33281200 #7172

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