Hamartoma and gelastic seizures: for use during laser ablation There are interval findings related to repeat laser ablation of the hypothalamic hamartoma with peripheral enhancing along the margins of the ablation zone and perhaps slight increase in size of the hamartoma. There is mass effect upon the optic apparatus, although it demonstrates normal signal. There is a non-enhancing T2 hyperintense focus in the region of the right anterior frontal lobe subcortical white matter that measures up to 12 mm, which has gradually increased in size. There is no evidence of acute cerebral infarction or hemorrhage. The ventricles are unchanged in size. There are findings related to prior frontal craniotomy and transcallosal surgery. There are small retained secretions within the left sphenoid and ethmoid sinuses. There is a small amount of persistent high T2 signal within the right mastoid tip air cells.
1. Expected findings related to repeat MRI guided laser ablation of a hypothalamic hamartoma. 2. A nonspecific lesion in the region of the right frontal lobe that measures up to 12 mm has gradually increased in size. This may represent a hamartoma of low-grade neoplasm.