Female, 60 years old, status post occipital bone surgery for arachnoid granulation removal, assess for changes. Sequelae of occipital bone surgery are again seen. Patchy enhancement is evident within the overlying scalp soft tissues and within the bony surgical defect. However, these findings are unchanged, and no evidence of any recurrent arachnoid granulation is seen.A nodule of tissue which appears to follow gray matter signal characteristics along the posterior body of the left lateral ventricle is unchanged. Brain parenchymal morphology is otherwise unremarkable. No restricted diffusion is seen. Scattered foci of white matter T2 hyperintensity are redemonstrated appearing similar to the prior examination. No edema or mass effect is detected. No intracranial hemorrhage or any abnormal extra-axial fluid collections are observed. The ventricular system is stable and normal in size.Normal flow related signal is seen within the vasculature of the anterior and posterior intracranial circulation. No significant stenosis or occlusion is detected. No aneurysms are seen. The ACOM artery is not well resolved on this examination. Prominent bilateral PCOM arteries are noted.
1.Demonstration of postoperative findings in the occipital region which are stable relative to the prior examination. No evidence to suggest a recurrence of the arachnoid granulations is seen.2.Unremarkable MRA of the brain.