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equal efficacy of treatment in disease control between groups. However, the processes of surgery or chemoradiotherapy to tumors in/near-eloquent areas may have led to side effects such as speech or motor deficits which then led to poorer OS. With our classification system, patients' existing MRIs can be used, with no extra investigations required. We aim to incorporate other factors such as PS to create a prognostic scoring system, and to develop MRI reporting guidelines to specify relation of a tumor to an eloquent area.