Female, 57 years old. Reason: ?hydrocephalus History: headache There is redemonstration of a right cerebellar mass with surrounding vasogenic edema and compression of the fourth ventricle. There is stable ventriculomegaly of the lateral ventricles. Slight herniation of the right cerebellar tonsil into the foramen magnum is again noted. No areas of hemorrhage are identified.The calvaria and skull base are radiographically normal. Skull lesion seen on recent bone scan is not visualized on this study. There is opacification of the mastoid air cells bilaterally, left greater than right.
Right cerebellar mass with associated vasogenic edema and compression of the fourth ventricle and crowding of the foramen magnum is not significantly changed since the prior examination.