Midbrain breast cancer metastasis status post laser ablation with clinical deterioration. There are postoperative findings related to right transfrontal laser ablation of a tumor centered within the right midbrain. The tumor displays central non-enhancement and scattered areas of susceptibility effect and has enlarged, measuring up to 32 mm, previously 21 mm. There is also markedly increased associated vasogenic edema, with effacement of the third ventricle and enlargement of the lateral ventricles. There is a partially empty sella. There is no evidence of acute infarction or intracranial hemorrhage. Thre appears to be flattening of the optic nerve discs.
Interval increase in size of the metastasis centered in the right midbrain treated via laser ablation, with extensive vasogenic edema and obstructive hydrocephalus.