 Redemonstrated is the patient's right ventriculostomy catheter with its tip in the medial right frontal horn, appearing slightly retracted and more medially when compared to the prior CT. There has been no significant change in lateral or third ventriculomegaly. A small amount of edema is again noted around the ventriculostomy catheter. As before, there are postoperative changes from previous suboccipital craniectomy and occipital craniotomy for debulking the patient's posterior fossa mass. As before, residual right-sided tumor results in associated mass effect on the upper cervical spine, medulla, pons, and midbrain with near effacement of the fourth ventricle. As before, fluid is noted within mastoid air cells.
Residual right-sided tumor results in associated mass effect on the upper cervical spine, medulla, pons, and midbrain with near effacement of the fourth ventricle.