Reason: pseudotumor cerebri, chiari and shunt, yearly follow up Again seen is evidence of suboccipital craniectomy and resection of the posterior C1 arch for Chiari decompression. The shape and positioning of the cerebellar tonsils above the C1 level are unchanged from prior. CSF flow sequence is significantly degraded but there is suggestion of preserved flow ventrally and dorsally at the foramen magnum. There is also no significant crowding at the foramen magnum.Minimal nonspecific T2 hyperintensity along the body of the right lateral ventricle is unchanged. No other new or significant parenchymal lesions are seen. No evidence of acute ischemia or hemorrhage within the limits of susceptibility artifact relating to the shunt. No mass effect or edema is detected. The ventricular system is stable and normal in size. Shunt catheter terminates near the foramen magnum on the left as seen before.Major flow-voids are preserved. Tiny right maxillary sinus mucus retention cyst which was also present previously. Paranasal sinuses and mastoid air cells are grossly clear.
Stable postoperative findings related to Chiari decompression. Stable size of ventricles. No new or acute intracranial abnormalities.