Clinical question: Preop planning. Signs and symptoms: Preop planning. Nonenhanced head CT:Stealth nonenhanced head CT for surgical planning is performed. Halo is secured to patient's calvarium.Examination demonstrates a well demarcated cystic lesion in the right cerebellum measuring approximately 33.3 x 15-mm in size.There is no appreciable interval change since prior exam in the size or density of this is. The overall mass effect on the fourth ventricle with slight deviation across the midline to the left is also similar to prior study.Images through supratentorial space demonstrate small less ischemic disease of indeterminate age as was noted on prior MRI study.
1.Steath enhanced preoperative surgical planning CT the reidentifies a stable right cerebellar cyst.2.Small vessel ischemic disease of indeterminate age.