No abstract

Our results indicate that most of nonfunctioning pituitary adenomas extending into the cavernous sinus are neither aggressive nor invasive. The high incidence of cavernous sinus extension of benign adenomas may be caused by the weakness of the medial wall of the cavernous sinus.

We report a 63-year-old man who had a rare bilateral thalamic glioma. He complained of difficulty with calculations and had mental deterioration. T1-weighted images revealed bilateral thalamic swelling with homogeneous low signal and no contrast enhancement. The tumour, showing decrease of N-acetylaspartate and the presence of lactate on magnetic resonance spectroscopy, was diagnosed as an astrocytoma by stereotactic biopsy.