Chiasmal haemorrhage secondary to glioma with unusual MRI appearance

To report a unique case of haemorrhagic presentation of a chiasmal and optic tract glioma (OPG) appearing as an extra-axial lesion on MRI scans.A 30-year-old female with a preoperative radiological diagnosis of dermoid cyst was operated. No lesion was found in the chiasmal or carotid cisterns within the operative field. The right posterolateral corner of the chiasma and the beginning of the right optic tract appeared swollen. The area was...