Cerebral oligodendroglioma: MRI versus histopathological grading
We analysed 46 MRI and 37 CT studies in 46 patients with cerebral oligodendrogliomas, to correlate MRI features with histological grading of the tumours. The tumours were pathologically graded as low (16) or intermediate (12), or anaplastic (18) oligodendroglioma. Each MRI criterion, including tumour size, presence or absence of calcification, cyst formation, haemorrhage, oedema, and contrast enhancement, was analysed with respect to the histological grading of the tumours. Among the various imaging features, peritumoral oedema and contrast enhancement were significantly more common in patients with anaplastic tumours than in patients with low-grade tumours. It is concluded that the presence of both peritumoral oedema and contrast enhancement is highly suggestive of anaplastic oligodendroglioma.
key wordsBrain neoplasm Oligodendroglioma Magnetic resonance imaging
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