zerebelläres Astrozytom

School ager

with double vision. Axial CT with contrast of the brain shows a large heterogeneous cystic and solid mass encompassing the entire right cerebellar hemisphere which is compressing the slit-like fourth ventricle and shifting it to the left, resulting in obstructive hydrocephalus of the third and lateral ventricles.The diagnosis was cerebellar astrocytoma.

School ager

with several days of vomiting. Axial CT without contrast of the brain (above) shows moderate dilation of the lateral, third and fourth ventricles. Axial T2 MRI without contrast of the brain (below left) shows a round focus of bright signal in the posterior medulla that on the sagittal T1 MRI post contrast (below right) shows it to be a non-enhancing mass in the floor of the fourth ventricle causing ventricular outlet obstruction.The diagnosis was cerebellar astrocytoma.