Midbrain and thalamus neuroglial cyst with associated arachnoid cyst: surveillance. There is no significant interval change in the right thalmus and midbrain multilocular cystic lesion, which measures up to approximately 35 mm and protrudes into the otherwise collapsed third ventricle. There is an unchanged right transfrontal ventricular shunt catheter, with unchanged nearly-collapsed right lateral ventricle and generally small caliber left lateral ventricle. There is unchanged diffuse high T2 signal along the path of the catheter in the right frontal lobe, which may represent gliosis. There is no evidence of acute intracranial hemorrhage or acute infarct. The major cerebral flow voids are intact. The orbits are grossly unremarkable. There is moderate mucosal thickening in the right sphenoid sinus and bubbly secretions in the left maxillary sinus.
1. Unchanged right thalmus and midbrain neuroglial cyst with associated arachnoid cyst. 2. Unchanged shunted ventricular system.3. Bubbly secretions in the left maxillary sinus may represent acute sinusitis. 