MRI VISUALIZATION OF COMPLETE BILATERAL OPTIC-NERVE INVOLVEMENT BY PITUITARY-ADENOMA - A CASE-REPORT

With large pituitary adenomas, the optic nerves and chiasm usually lie on the tumour capsule and are displaced superiorly. We report a large invasive pituitary adenoma, with complete involvement of both optic n erves. Review of the preoperative MR images demonstrated the optic ner ves, with signal intensity close to that of cerebral white matter, and different from the flow void of the basal cerebral arteries. Correlat ion of this observation with intraoperative findings is discussed.