Female, 12 years old, with hydrocephalus, VP shunt, yearly follow-up examination. An ill-defined, T2 hyperintense, partially cystic lesion is redemonstrated involving the right basal ganglia, thalamus, hypothalamus, anteromedial temporal lobe, and left hypothalamus. As before, this lesion demonstrates patchy intrinsic T1 hyperintensity and patchy susceptibility effect. No definite pathologic enhancement is seen above and beyond the intrinsic T1 signal. There has been no significant interval change in these findings.A right parietal approach ventricular catheter is redemonstrated and appears to be in stable position. Ventricular size and morphology are unchanged. The left lateral ventricle is nearly completely collapsed. The right lateral ventricle is normal in caliber with stable trace T2 hyperintensity along the ependyma of the atrium and occipital horn. The third and fourth ventricles are normal.The right cerebral peduncle is thinner than the left likely reflecting degeneration. No evidence of acute intracranial hemorrhage or any abnormal extra-axial fluid collection is seen. An incidental pineal cystic lesion is unchanged.
No change in the heterogeneous T2 hyperintense, cystic lesion affecting the right thalamus, basal ganglia, hypothalamus and medial temporal lobe.