Presentation
Headache.
Patient Data
Age: 40 years
Gender: Female
From the case:
Chiari 1 malformation
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/141622/annotated_viewer_json?lang=us"}
There is caudal tonsillar ectopia (7 mm below the basion opisthion line). No hydrocephalus or syrinx. Otherwise unremarkable study.
From the case:
Chiari 1 malformation
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/141894/annotated_viewer_json?lang=us"}
Case Discussion
Chiari 1 malformation is defined as caudal cerebellar tonsillar ectopia.
Tonsillar ectopia measuring 5 mm or more below the foramen magnum is generally considered diagnostic, with additional abnormalities like tonsillar deformity and obliterated retrotonsillar CSF spaces.
Unable to process the form. Check for errors and try again.