 There is no evidence of acute ischemic or hemorrhagic lesion on the scan.There is no evidence of abnormal enhancement.About 5mm cerebellar tonsilar ectopia through the foramen magnum.The ventricles, sulci and cisterns are symmetric and unremarkable. The gray-white matter differentiation is normal. There is no mass, mass effect, edema, midline shift, intra or extra-axial fluid collection/hemorrhage, restricted diffusion/acute ischemia, or abnormal contrast enhancement. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The mastoid air cells are clear.Mild mucosal thickening on ethmoid sinus and a couple of retention cysts in the left maxillary sinus.
About 5mm cerebellar tonsilar ectopia through the foramen magnum.Otherwise unremarkable brain MRI scan.