Quality of Life Is Independently Associated With Neurocognitive Function in Patients With Brain Tumors: Analysis of a Prospective Clinical Trial

The effect of radiation dose to the brain on early self-reported cognitive function in brain and head-and-neck cancer patients

Purpose

Assess cognitive changes after radiotherapy (RT) in brain and head-and-neck (HN) cancer patients using patient-reported outcome measures (PROMs) and evaluate a dose-effect relationship for brain structures.

Materials and methods

Primary brain and HN cancer patients treated with RT between 2012-2021 were included. Patient characteristics, clinical parameters, and PROMs at baseline and 1-year follow-up were collected. Cognitive functioning (CF) from the EORTC QLQ-C30, communication deficit (CD) from the QLQ-BN20, and one cognition-related questions from the EQ6D questionnaire were used, the latter two only for brain patients. Missing data were imputed and the four-point scale scores were transformed to a 100-point scale. Change in scores from baseline to 1-year were categorized into improvement/constant or deterioration. Organs-at-risk (OARs) were contoured either clinically or retrospectively using autocontouring and dose to the OARs were calculated.

Results

A total of 110 brain and 356 HN cancer patients were included. Median age was 56 (brain) and 67.5 (HN) years. Baseline and 1-year CF was significantly lower for brain patients (p < 0.001). Univariate analysis for ΔCF showed that age at start RT ≤ 65 years, receiving chemotherapy, higher CF Baseline score, brain mean dose > 3 Gy, and multiple dose levels to left and right hippocampus were statistically associated with cognitive deterioration. Multivariate analysis for ΔCF identified age at RT ≤ 65 years, higher CF Baseline score, and brain mean dose > 3 Gy as significant predictors.

Conclusion

This study identified risk factors for subjective cognitive decline and suggests that patients' self-perceived cognitive deterioration may be related to age, CF baseline score and brain radiation dose above 3 Gy.

Cognitive phenotypes: Unraveling the heterogeneity in cognitive dysfunction among patients with primary brain tumors receiving radiotherapy

BACKGROUND

Patients with primary brain tumors demonstrate heterogeneous patterns of cognitive dysfunction, which we explore using latent profile analysis to identify cognitive phenotypes and their trajectories in patients receiving radiotherapy (RT).

METHODS

Ninety-six patients completed neuropsychological testing before and post-RT (3, 6, and 12 months) on a prospective longitudinal trial, including measures of processing speed, executive function, language, and verbal and visual memory. Models with 2-4 classes were examined. Demographic and clinical data were examined across phenotypes and post-RT cognitive change was evaluated.

RESULTS

The optimal model identified 3 unique cognitive phenotypes including a group of patients with generalized impairments (11.5%), a group with isolated verbal memory impairments (21.9%), and a group with minimal impairments (66.7%). The Verbal Memory phenotype had fewer years of education (P = .007) and a greater proportion of males (P < .001); the Generalized group had a greater proportion of patients with IDH-wild type gliomas and showed greater symptoms of anxiety and poorer quality of life (P-values < .05); and the Minimal Impairment phenotype had higher rates of IDH-Mutant gliomas. Approximately 50% of patients declined on at least one cognitive domain with memory being the most vulnerable. Patients who declined reported greater symptoms of depression (P = .007) and poorer quality of life (P = .025).

CONCLUSIONS

We identified 3 distinct cognitive phenotypes in patients with primary brain tumors receiving RT, each associated with unique demographic and clinical (eg, IDH mutational status) profiles, with mood symptoms associated with late cognitive decline. This patient-centered approach enhances our understanding of clinical profiles associated with cognitive dysfunction and treatment-related neurotoxicity.

Understanding language and cognition after brain surgery - Tumour grade, fine-grained assessment tools and, most of all, individualized approach

Cognitive performance influences the quality of life and survival of people with glioma. Thus, a detailed neuropsychological and language evaluation is essential. In this work, we tested if an analysis of errors in naming can indicate semantic and/or phonological impairments in 87 awake brain surgery patients. Secondly, we explored how language and cognition change after brain tumour resection. Finally, we checked if low-tumour grade had a protective effect on cognition. Our results indicated that naming errors can be useful to monitor semantic and phonological processing, as their number correlated with scores on tasks developed by our team for testing these domains. Secondly, we showed that - although an analysis at a whole group level indicates a decline in language functions - significantly more individual patients improve or remain stable when compared to the ones who declined. Finally, we observed that having LGG, when compared with HGG, favours patients' outcome after surgery, most probably due to brain plasticity mechanisms. We provide new evidence of the importance of applying a broader neuropsychological assessment and an analysis of naming errors in patients with glioma. Our approach may potentially ensure better detection of cognitive deficits and contribute to better postoperative outcomes. Our study also shows that an individualized approach in post-surgical follow-ups can reveal reassuring results showing that significantly more patients remain stable or improve and can be a promising avenue for similar reports. Finally, the study captures that plasticity mechanisms may act as protective in LGG versus HGG after surgery.

Dose-Dependent Atrophy in Bilateral Amygdalae and Nuclei After Brain Radiation Therapy and Its Association With Mood and Memory Outcomes on a Longitudinal Clinical Trial

PURPOSE

Amygdalae are bilateral, almond-shaped structures located anterior to the hippocampi, critical to limbic system functions of emotional processing and memory consolidation. The amygdalae are heterogeneous, composed of multiple nuclei with distinct structural and functional properties. We prospectively assessed associations between longitudinal changes in amygdala morphometry, including component nuclei, and functional outcomes in patients with primary brain tumors receiving radiation therapy (RT).

METHODS AND MATERIALS

On a prospective longitudinal trial, 63 patients underwent high-resolution volumetric brain magnetic resonance imaging and testing for mood (Beck Depression Inventory and Beck Anxiety Inventory), memory (Brief Visuospatial Memory Test-Revised [BVMT] Total Recall and Delayed Recall; Hopkins Verbal Learning Test-Revised [HVLT] Total Recall and Delayed Recall), and health-related quality-of-life outcomes (Functional Assessment of Cancer Therapy-Brain Social/Family Well-Being and Emotional Well-Being) at baseline and 3, 6, and 12 months after RT. Amygdalae, including 8 nuclei, were autosegmented bilaterally using validated techniques. Linear mixed-effects models assessed longitudinal change in amygdalae and nuclei volumes and associations with dose and outcomes. Wilcoxon rank sum tests compared amygdala volume change between patient groups with worse and more stable outcomes at each time point.

RESULTS

Atrophy was found in the right amygdala at 6 months (P = .001) and the left amygdala at 12 months (P = .046). A higher dose was associated with atrophy of the left amygdala (P = .013) at 12 months. The right amygdala showed dose-dependent atrophy at 6 months (P = .016) and 12 months (P = .001). Worse BVMT-Total, HVLT-Total, and HVLT-Delayed performance was associated with smaller left lateral (P = .014, P = .004, and P = .007, respectively) and left basal (P = .034, P = .016, and P = .026, respectively) nuclei volumes. Increased anxiety at 6 months was associated with greater combined (P = .031) and right (P = .007) amygdala atrophy. Greater left amygdala atrophy (P = .038) was noted in patients with decreased emotional well-being at 12 months.

CONCLUSIONS

Bilateral amygdalae and nuclei undergo time- and dose-dependent atrophy after brain RT. Atrophy in amygdalae and specific nuclei was associated with poorer memory, mood, and emotional well-being. Amygdalae-sparing treatment planning may preserve neurocognitive and neuropsychiatric outcomes in this population.

Identification of health-related quality of life profiles among long-term survivors of primary central nervous system tumors

PURPOSE

We aimed to identify health-related quality of life (HRQOL) latent classes among primary central nervous system tumor (PCNST) long-term survivors (LTS) and to evaluate differences between classes in survivor sociodemographic characteristics, clinical characteristics, and symptoms to guide  the development of survivorship care programs tailored to unique class needs.

METHODS

Data from 298 PCNST LTS reporting HRQOL on the EQ-5D-3L were analyzed using latent profile analysis. Correlations and independent group t-tests were performed to identify differences between identified HRQOL classes by sociodemographic, clinical characteristics, and symptoms.

RESULTS

Sample mean age was 48 years, 54% were male, 82% Caucasian, 56% employed, 60% had a high-grade glioma, and 52% had a KPS ≥ 90. Two HRQOL classes, good (61%) and poor (39%), were identified. The good HRQOL class reported no problems with self-care and few problems with mobility or usual activities. Thirty-eight percent reported anxiety and depression and 21% pain. Over 94% of the poor HRQOL class had at least moderate problems with mobility and usual activities, and over 50% had pain, self-care issues, anxiety, and depression. Older age (φ = 0.21), unemployment (φ = 0.30), spine tumors (φ = 0.18), active treatment (φ = 0.20), tumor recurrence (φ = 0.28), and poorer KPS scores (φ = 0.61) were associated with membership in the poor HRQOL class.

CONCLUSIONS

In the poor PCNST LTS HRQOL class, an overwhelming majority faced significant physical challenges, and the good HRQOL class experienced mood-related disturbance but limited physical challenges. These HRQOL profiles can be used to guide survivorship programs and tailored interventions.

Preservation of Neurocognition after Proton Beam Radiation Therapy for Intracranial Tumors: First Results from REGI-MA-002015

PURPOSE

Proton beam radiation therapy reduces dose to healthy brain tissue and thereby decreases the risk of treatment-related decline in neurocognition. Considering the paucity of prospective data, this study aimed to evaluate neurocognitive performance in an adult patient population with intracranial tumors.

METHODS AND MATERIALS

Between 2017 and 2021, patients enrolled in the MedAustron registry study and irradiated for intracranial tumors were eligible for neurocognitive assessment. Patients with available 1-year follow-up data were included in the analysis. The test battery consisted of a variety of standardized tests commonly used in European Organization for Research and Treatment of Cancer trials. Scores were transformed into z scores to account for demographic effects, and clinically relevant change was defined as a change of ≥1.5 standard deviations. Binary logistic regression analysis and the χ² test were conducted for clinical parameters and dosimetric hippocampal parameters to evaluate the relationship with overall cognitive decline and changes in memory.

RESULTS

One hundred twenty-three patients with mostly nonprogressive, extra-axial tumors and neurocognitive assessment at baseline and treatment end as well as 3, 6, and 12 months after completion of proton beam radiation therapy were analyzed. Overall, 7 test scores revealed stability in neurocognitive function with minimal positive changes 1 year after treatment completion (statistically significant in 6 of 7 tests), whereas the majority had no or minimal baseline deficits. At 1-year follow-up, 89.4% of all patients remained stable in their overall cognitive functioning without clinically relevant deterioration in 2 or more tests. None of them showed disease progression. Of the patients, 8.1% presented with radiation-induced brain lesions and exhibited a higher percentage of overall cognitive deterioration without reaching statistical significance. Multivariate binary logistic regression analysis revealed higher age at baseline as the only independent parameter to be associated with an overall clinically relevant cognitive decline. There was no significant correlation of hippocampal doses and memory functioning.

CONCLUSIONS

One year after proton therapy, we observed preservation of cognitive functioning in the vast majority of our patients with intracranial tumors.

Cognitive and neuroimaging outcomes in individuals with benign and low-grade brain tumours receiving radiotherapy: a protocol for a prospective cohort study

INTRODUCTION

Radiation-induced cognitive decline (RICD) occurs in 50%-90% of adult patients 6 months post-treatment. In patients with low-grade and benign tumours with long expected survival, this is of paramount importance. Despite advances in radiation therapy (RT) treatment delivery, better understanding of structures important for RICD is necessary to improve cognitive outcomes. We hypothesise that RT may affect network topology and microstructural integrity on MRI prior to any gross anatomical or apparent cognitive changes. In this longitudinal cohort study, we aim to determine the effects of RT on brain structural and functional integrity and cognition.

METHODS AND ANALYSIS

This study will enroll patients with benign and low-grade brain tumours receiving partial brain radiotherapy. Patients will receive either hypofractionated (>2 Gy/fraction) or conventionally fractionated (1.8-2 Gy/fraction) RT. All participants will be followed for 12 months, with MRIs conducted pre-RT and 6-month and 12 month post-RT, along with a battery of neurocognitive tests and questionnaires. The study was initiated in late 2018 and will continue enrolling through 2024 with final follow-ups completing in 2025. The neurocognitive battery assesses visual and verbal memory, attention, executive function, processing speed and emotional cognition. MRI protocols incorporate diffusion tensor imaging and resting state fMRI to assess structural connectivity and functional connectivity, respectively. We will estimate the association between radiation dose, imaging metrics and cognitive outcomes.

ETHICS AND DISSEMINATION

This study has been approved by the Research Subjects Review Board at the University of Rochester (STUDY00001512: Cognitive changes in patients receiving partial brain radiation). All results will be published in peer-reviewed journals and at scientific conferences.

TRIAL REGISTRATION NUMBER

ClinicalTrials.gov NCT04390906.

The burden of a brain tumor: guiding patient centric care in neuro-oncology

PURPOSE

Brain tumor patients report an overwhelming sense of uncertainty when navigating the course of their terminal disease. Historically, organizational experts and/or treating physicians have established neuro-oncology programs. However, given the disease burden and incurable nature of current medical treatments, patient-centric care should be prioritized alongside institutional and academic objectives. Integrating patient perspectives into interdisciplinary programmatic development can improve comprehensive care and empower patients to advocate for their own quality healthcare needs.

METHODS

Data was derived from four focus groups with adult brain tumor patients (N = 15; M_age = 46 years, 53% female). A trained moderator led each 90-min group and posed semi-structured questions regarding patients' care needs throughout their neuro-oncological disease trajectory. Emphasis was placed on quality of life and psychological distress reduction for both patients and their loved ones. Common themes were identified via thematic content analysis using NVivo software. A high inter-rater reliability (M_kappa = 0.92, range= 0.85-0.93) was achieved.

RESULTS

Six distinct themes emerged, where the frequency of each theme ranged from 12.5 to 23.3%. Specifically, patients discussed relational concerns, navigation of interdisciplinary care, neurobehavioral impacts, emotional responses to stressors, existential concerns, and caregiver support. A discussion of themes follows.

CONCLUSIONS

It is imperative that we include the patient perspective in the development of neuro-oncology programs; considering the quality of survival in addition to quantity. Neuro-oncology quality care themes identified were relational concerns, navigating interdisciplinary care, neurobehavioral impact, emotional response to stressors, existential concerns, and caregiver support. A paramount concentration for comprehensive neuro-oncology programs must include patients' quality needs.