Clinical question: Bleed. Signs and symptoms: Acute change in mental status. Nonenhanced head CT:There is no evidence of intracranial hemorrhage, edema, mass-effect, midline shift or hydrocephalus. Cortical sulci, ventricular system and gray -- white matter differentiation is preserved and unremarkable. On sagittal reformatted images there is suggestion of slight ectopia of cerebellar tonsils. Please correlate with history and follow-up with an MRI examination.Calvarium is intact. Visualized paranasal sinuses, middle ear cavities and mastoid air cells are unremarkable
1.No evidence of acute intracranial findings. 2.Minimally ectopic cerebellar tonsils which may require further follow-up with an MRI.