Chiari II malformation

Case contributed by A.Prof Frank Gaillard


Long history of neurological disturbance.

Patient Data

Age: 20 years
Gender: Female

Right parietal V-P shunt in situ. No hydrocephalus. Extra-axial spaces are mildly prominent but there is no overt subdural collection to suggest over shunting.

Typical features of Chiari 2 malformation with more than 25 mm of cerebellar tonsillar ectopia, small posterior fossa, towering cerebellum, peaked tectal plate, callosal dysgenesis with hypoplastic body and splenium and associated colpocephaly, fenestrated falx with gyral interdigitation, diffuse posterior predominant stenogyria and large massa intermedia. The clivus is vertically oriented and the sella is shallow with superior convexity of the pituitary, projecting into the suprasellar cistern, and relative inferior displacement of the posterior pituitary bright spot.

No other gross midline abnormality. In particular, the optic chiasm is unremarkable. No evidence of a syrinx in the imaged upper cervical cord.


Shunt series, demonstrates the distal tip of the shunt lies centrally in the abdomen at the level of L1. Prominent multilevel spina bifida noted with associated scoliosis. 

Case Discussion

Typical features of Chiari 2 malformation.

PlayAdd to Share

Case information

rID: 39751
Case created: 18th Sep 2015
Last edited: 25th Aug 2016
Inclusion in quiz mode: Included

Updating… Please wait.

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.