Recent tumor resection (right lateral ventricle central neurocytoma). There has been recent right posterior parietal craniotomy with re--resection of the right alteral ventricle mass and external ventricular drain insertion, with what appears to be a small amount of residual tumor anterior to the catheter tip. There is also confluent T2 hyperintensity, restricted diffusion, linear enhancement, and susceptibility effect along the surgical tract, a small amount of extradural fluid deep to the craniotomy flap, and extensive subgaleal fluid. The catheter extends to the midline of the right lateral ventricle. There is also a right transfrontal ventricular catheter that terminates in the third ventricle. The ventricular sytem is unchanged in size and there is a small amount of residual intraventricular hemorrhage and pneumocephalus. There has been interval evolution of postoperative findings related to right frontal craniotomy with right frontal lobe edema and areas of gyriform restricted diffusion and susceptibility effect. There is persistent mild scattered leptomeningeal enhancement in the right frontal region. There are scattered foci of restricted diffusion in the right centrum semiovale.
1. Postoperative findings related to recent re-resection of a right lateral ventricle central neurocytoma with what appears to be a small amount of residual tumor, as well hemorrhage, ischemia, and edema along the right transfrontal surgical tract. 2. Unchanged size of the shunted ventricular system with a small amount of intraventricular hemorrhage.3. Punctate foci of acute infarction in the right centrum semiovale.4. Gyriform recent infarcts and hemorrhage superimposed upon vasogenic edema in the right frontal lobe surgical bed region.