 There has been interval removal of the left-sided catheter with scattered areas of pneumocephalus and linear areas of susceptibility effect along the prior catheter tracts, which are likely related to blood products. There are also chronic postoperative findings related to right hemispherectomy with a persistent fluid collection in the right extradural space deep to the craniectomy flap, that measures approximately 16 mm in thickness. There is slight interval change in the configuration of the cystic components in associated with the deformed left lateral ventricle, although the overall size of these is unchanged. There is unchanged diffuse confluent T2 hyperintensity in a large portion of the left hemisphere in the periventricular region and punctate areas of encephalomalacia in the pons. There is unchanged posterior deviation and areas of encephalomalacia in the upper cervical spinal cord. However, there is no evidence of acute infarction. The right hemispheric craniotomy flap has multiple areas of deficiency that reflect bone resorption.
1. Interval removal of the left-sided catheter with no significant overall change in size of the ventricular system and associated cystic compartments, although the configuration of these appears to be slightly altered. 2. Chronic postoperative findings related to right hemispherectomy, with no significant change in the degree of the left hemisphere and pontine gliosis and/or encephalomalacia.3. Unchanged posterior deviation and encephalomalacia upper cervical spinal cord, which may be related to adhesions and chronic infarction, but no evidence of acute infarction.