33 years, Female, brain lesion. Examination is limited to sequences for operative planning and intraoperative navigation. Again seen is an enhancing mass involving the right aspect of the midbrain and thalamus. The mass measures approximately 2.5 x 2.2 x 2.3 cm in the AP, transverse, and craniocaudal dimensions. Placement of right transfrontal laser fiber is seen for ablation which extends into the deep aspect of the lesion at the level of the midbrain. Central areas of nonenhancement are noted compatible with postsurgical change. No new mass effect. Leftward displacement of the third ventricle is again noted. Ventricles remain unchanged in size. Minimal T1 hyperintensity and enhancement is evident at the laser fiber insertion site. No significant hemorrhage or extra-axial collections are evident.
Examination for operative planning and intraoperative guidance. Expected postsurgical changes of laser ablation of right midbrain/thalamus mass are seen.