19-year-old male with a history of sickle cell disease status post allogenic stem cell transplant one year ago. Assess for abnormality. MRI brain:No significant parenchymal signal abnormality is seen. There is no evidence of edema or mass effect. Diffusion-weighted images are within normal limits. No intracranial hemorrhage or abnormal extra-axial fluid is detected. The ventricular system is normal in size and morphology. A normal variant subcentimeter hippocampal sulcus remnant cyst is seen along the left medial temporal lobe. A subcentimeter focus of T1 hyperintensity again seen within the left parietal calvarium likely represents a benign hemangioma.MRA brain:On MR angiographic imaging, there is a 2 x 3 mm superiorly projecting aneurysm at the junction between the left PCA and left P-comm artery, which in retrospect was present previously and is unchanged. No significant intracranial vascular stenosis or occlusion is seen. The vessels of the anterior and posterior circulation demonstrate normal flow related signal. Patent anterior and bilateral posterior communicating arteries.
1.No significant brain parenchymal abnormalities are seen.2.2 x 3 mm superiorly projecting left posterior cerebral artery aneurysm at the P1/P2 junction which is unchanged since 9/9/2015. Otherwise the evaluation of the intracranial vasculature is unremarkable with no significant stenosis.