Case Notes
History
11 yo female w/ Langerhans histiocytosis mass resected 6 yrs earlier. No has 2 week history of dizziness, gait instability and headaches. Cerebellar biopsy: nonspecific inflammation (SIRS)Exam
MR sagittal plane
Prior Study
Noncontrast head CT and T2- MR obtained 5 days after the CT1. Unexplained cerebellar tonsillar displacement in the context of apparent bilateral cerebellar edema.
2. T2-w MR obtained 5 days after the head CT exhibits both the earliest features of obstructive hydrocephalus related to parenchymal cerebellar edema and caudal 4th ventricle outlet obstruction.