21-year-old female with chronic daily headaches since age 13 There is no evidence of acute intracranial hemorrhage, mass or edema. No areas of abnormal enhancement are identified. The gray-white matter differentiation is preserved.Crowding of the foramen magnum is partially visualized suggesting a Chiari one malformation. Further correlation with MRI is recommended. The ventricles and basal cisterns are normal in size and configuration.The calvaria and skull base are radiographically normal. The visualized paranasal sinuses and mastoid air cells are normally pneumatized.
Likely Chiari 1 malformation. Recommend further correlation with MRI.