journal article Open Access Dec 01, 2021

Shape matters: morphological metrics of glioblastoma imaging abnormalities as biomarkers of prognosis

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Abstract
AbstractLacunarity, a quantitative morphological measure of how shapes fill space, and fractal dimension, a morphological measure of the complexity of pixel arrangement, have shown relationships with outcome across a variety of cancers. However, the application of these metrics to glioblastoma (GBM), a very aggressive primary brain tumor, has not been fully explored. In this project, we computed lacunarity and fractal dimension values for GBM-induced abnormalities on clinically standard magnetic resonance imaging (MRI). In our patient cohort (n = 402), we connect these morphological metrics calculated on pretreatment MRI with the survival of patients with GBM. We calculated lacunarity and fractal dimension on necrotic regions (n = 390), all abnormalities present on T1Gd MRI (n = 402), and abnormalities present on T2/FLAIR MRI (n = 257). We also explored the relationship between these metrics and age at diagnosis, as well as abnormality volume. We found statistically significant relationships to outcome for all three imaging regions that we tested, with the shape of T2/FLAIR abnormalities that are typically associated with edema showing the strongest relationship with overall survival. This link between morphological and survival metrics could be driven by underlying biological phenomena, tumor location or microenvironmental factors that should be further explored.
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Published
Dec 01, 2021
Vol/Issue
11(1)
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Funding
National Institutes of Health Award: U01CA220378
Arizona Biomedical Research Commission Award: ADHS16-162514
Ben and Catherine Ivy Foundation
Cite This Article
Lee Curtin, Paula Whitmire, Haylye White, et al. (2021). Shape matters: morphological metrics of glioblastoma imaging abnormalities as biomarkers of prognosis. Scientific Reports, 11(1). https://doi.org/10.1038/s41598-021-02495-6