Abstract

Abstract Advanced multimodality treatments that have led to longer survival rates for patients with low-grade gliomas (LGGs) have also resulted in significant changes in cognition and quality of life (QoL). These changes remain poorly understood, largely due to the lack of multifactorial and in-depth studies on cognitive impairment in patients with LGG. Resting-state functional MRI (rs-fMRI) has been widely used as a reliable imaging biomarker to evaluate the treatment outcome by characterizing the cerebral networking alteration associated with a patient’s neurological status. In this preliminary report of an active study, we investigated the cognitive function and cerebral networking connectivity via rs-fMRI in survivors who had completed treatment for LGG within the past 10 years. Survivors were administered a battery of standardized neuropsychological tests. Of the 20 participants enrolled to date (mean age 43 ± 11), 10 participants were categorized as cognitively impaired based on the International Cognition and Cancer Task Force (ICCTF) guidelines, with recommended adjustments considering the number of tests in the battery. Compared to cognitively unimpaired participants, functional connectivity in cognitively impaired patients was lower between memory, visuospatial processing, and primary sensorimotor regions. These preliminary observations suggest there is a potential link between overall cognitive impairment and functional connectivity of various networks as measured using resting-state fMRI.

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