Unspecified convulsions [R56.9], Reason for Study: ^Reason: eval structural lesion History: new onset seizures. There is no evidence of acute ischemic or hemorrhagic lesion.About 3-4 mm downward herniation of bilateral cerebellar tonsils are seen.There is no evidence of abnormal enhancement.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, or restricted diffusion/acute ischemia. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.
About 3-4 mm bilateral cerebellar tonsillar herniation through the foramen magnum.Otherwise unremarkable brain MRI.