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Examples of radiological characteristics used in the study. a Peritumoural oedema manifested as T2 hyperintensity immediately surrounding the tumour with mass effect. b Irregular margins with ‘mushrooming’ and nodules appearing as if detached from main mass of tumour. c Bone involvement in a parasagittal meningioma. d Sinus involvement manifest with tumour clearly present in the cavity of the superior sagittal sinus
