Recent biopsy of a low grade glioma involving the brainstem, with new right 6th nerve palsy and dysphagia. There are postoperative findings related to right transfrontal biopsy of the medullary lesion. There is a small amount of susceptibility effect along the biopsy track, which traverses the lateral margin of the right red nucleus and the posterior right pons, in the region of the abducens nucleus and the root of the abducens nerve, as well as the medulla, in the region of the right hypoglossal nucleus. There is no evidence of acute infarct. There is a small amount of pneumoventricle, but the ventricles are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are grossly intact. The paranasal sinuses and orbits are unremarkable.
Postoperative findings related to right transfrontal biopsy of the medullary glioma. There is a small amount of susceptibility effect along the biopsy track, which traverses the posterior right pons, in the region of the abducens nucleus and the root of the abducens nerve, as well as the medulla, in the region of the right hypoglossal nucleus. 