28-year-old female with high and low pressure symptoms per pt. Assess cyst size.  Brain cyst, shunt, headaches, worsening symptoms. Redemonstrated is evidence of a right-sided hemispherectomy with fragmentation involving the right calvarium related to multiple prior craniotomies. The extra-axial/extra-dural fluid collection along the right cerebral convexity has continued to decrease in size compared with the previous head CT and brain MRI. Unchanged position of catheter spanning from this fluid collection to the left, across the residual left cerebral hemisphere, terminating within the left temporal lobe.A cyst within the anteromedial left temporal lobe measuring approximately 23 mm in longest diameter appears similar to the prior exam. There has been re-accumulation of a more medial cyst positioned just posterior to the catheter and measuring 15 x 18 mm (series 501, image 18). The extensive chronic cerebral dysmorphism is unchanged. The white matter surrounding the residual left sided ventricular system remains T2 hyperintense. No new mass effect is appreciated.
1.Interval re-accumulation of a more medial cyst just posterior to the catheter compared to the prior exam.2.Interval continued decrease in the size of the right extra-axial/extra-dural fluid collection. 3.The remainder of the exam is not significantly changed compared to prior.