Female, 18 years old, with headache and Chiari malformation. Postoperative findings are seen compatible with Chiari decompressive surgery. The cervical tonsils are similar in morphology to the prior exam. The CSF space at the level of the foramen magnum is widely patent. Robust biphasic CSF flow is evident through the anterior foramen magnum with a blush of flow related signal seen posteriorly. These findings are not significantly changed from prior.The brain parenchyma otherwise demonstrates normal morphology. No pathologic signal abnormality is seen. No intracranial hemorrhage or abnormal extra-axial fluid is detected. Ventricular system is patent and normal in size.
1.Stable findings consistent with Chiari decompressive surgery.2.The CSF space at the level of the foramen magnum remains widely patent. Robust CSF flow is seen anteriorly with a blush of flow posteriorly, similar to the prior exam.