Chiari malformation
From Radipedia
- Chiari I: low lying cerebellar tonsils (5mm below line drawn between opisthion and basion), syrinx
- Chiari II: displacement of the medulla, fourth ventricle and cerebellum through the foramen magnum, associated myelomeningocoele
- Chiari III: Chiari II with high cervical encephalocoele
On fetal ultrasound can see Lemon or Bannana signs
