Clinical question : Status post craniotomy for posterior fossa lesion. Signs and symptoms: As above. Nonenhanced head CT:There is expected postoperative changes of the right paramedian suboccipital craniotomy. Residual vasogenic edema in the right cerebellum is again noted. There is no evidence of parenchymal hemorrhage. Air filled surgical cavity measures approximately 17 times 12-mm in size. Fourth ventricle is in normal position and normal in size. The residual air in the subarachnoid space is also present.Focus of encephalomalacia in the left occipital lobe is likely result of an old stroke and unchanged since prior MRI exam.Prominence of cortical sulci and ventricular system for patient's stated age is similar to the preoperative study.
1.Expected postoperative changes of right paramedian suboccipital craniectomy.2.Residual vasogenic edema in the right cerebellum similar to prior study.3.Prominence of cortical sulci and ventricular system for patient's stated age of 56 similar to prior exam.4.Focus of encephalomalacia in the left occipital lobe as was seen on prior MRI study.