36 year old male with worse headache of life No evidence of hemorrhage, edema, mass-effect, midline shift or hydrocephalus is detected. Images through posterior fossa demonstrate slight bony remodeled all foramina magnum with crowding of the cerebellar tonsils at the level of foramina magnum. This findings are suspected for ectopic cerebellar tonsils. This finding can be further evaluated with a dedicated MRI of brain.Calvarium, paranasal sinuses and mastoid air cells are unremarkable
1.No evidence of acute findings.2.Highly suspected Chiari malformation. Further evaluation with an MRI is recommended.