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【Background】For cranial-irradiation-naive patients with intracranial meningiomas at risk of local recurrence, the administration of conformal cranial radiotherapy can enhance tumor control in the current era of modern radiotherapeutic techniques. Life expectancy in patients with intracranial meningiomas, particularly non-malignant meningiomas (WHO grade I and II) is essentially similar to people of general population. However, RT-related neurocognitive function (NCF) sequelae are potentially and seriously a concern which should not be ignored. In terms of the natural course of cranial irradiation-induced NCF decline, it might vary considerably according to the specific domains which are selected to be measured. Early neurocognitive decline principally involves impairments of episodic memory, which is significantly associated with functions of the hippocampus. Additionally, the extent of changes in hippocampal volume after local irradiation may be associated with the hippocampal dosimetry. This study thus aims to investigate the potential cause-effect relationship between the hippocampal dosimetry and radiological outcomes represented by the volumetric changes regarding the contralateral hippocampus; furthermore, the correlation between radiological outcomes and neurocognitive endpoints will be examined and clarified. 【Methods】Patients with cranial-RT-naive intracranial meningiomas may be eligible and therefore enrolled in this prospective study addressing both radiological outcomes and neurocognitive endpoints. All eligible and recruited patients should receive baseline volumetric brain MRI examination and baseline neurobehavioral assessment. Subsequently, conformal cranial irradiation in the era of modern radiotherapeutic techniques (including hypofractionated stereotactic radiotherapy, proton beam therapy volumetric modulated arc therapy) will be utilized in order to reduce the dose irradiating the contralateral hippocampus and other relevant organs at risk. The prescribed dose schemes for treating patients with intracranial meningioma depend on the decision of the radiation oncologist in charge and follow the treatment guidelines at our cancer center. Accordingly, a battery of neurocognitive measures, which includes 9 standardized neuropsychological tests categorized into 5 NCF domains (e.g., executive functions, verbal & non-verbal memory, working memory, psychomotor speed, and amygdala-related emotion recognition), is used to evaluate neurocognitive performances longitudinally for our registered patients. There will be two co-primary outcome measures in the current study. The main primary outcome will be the correlation between the mean hippocampal dose and the extent of change in hippocampal volume at 6 months after the course of cranial RT. The other primary endpoint will be 6-month cognitive-deterioration-free survival. 【Expected Results】This prospective observational cohort study aims to explore and investigate the cause-effect relationship between the hippocampal dosimetry (i.e., mean dose irradiating the hippocampus, particularly the one contralateral to the lateralization of intracranial meningioma) and the extent of hippocampal atrophy signifying one of the measures regarding radiological outcomes. Simultaneously, predefined standardized neurocognitive outcome measures such as hippocampus-related memory functions and amygdala-related emotion recognition will be obtained prospectively and longitudinally in order to examine whether any meaningfully significant correlation exists between the above radiological outcome measures and neurocognitive endpoints. The mutual associations among hippocampal dosimetry, radiological outcomes including the MRI-delineated hippocampal volume, and neurocognitive endpoints including hippocampus-related verbal/non-verbal memory functions will be examined thoroughly.
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Accepts Healthy Volunteers
Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms |
No |
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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. |
Observational [Patient Registry] |
| Eligible Ages | 18 Years - 85 Years |
| Gender | All |
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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. |
NCT05832099 |
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Phase
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. |
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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 |
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Principal Investigator
The person who is responsible for the scientific and technical direction of the entire clinical study. |
N/A |
| Principal Investigator Affiliation | N/A |
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Agency Class
Category of organization(s) involved as sponsor (and collaborator) supporting the trial. |
Other |
| Overall Status | Not yet recruiting |
| Countries | Taiwan |
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Conditions
The disease, disorder, syndrome, illness, or injury that is being studied. |
Intracranial Meningioma |
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