Posterior fossa anomalies
on
6.2.09
with
0 comments
You are here: Home » Pathology Notes » Posterior fossa anomalies
Arnold-Chiari malformation
Small posterior fossa, cerebellar vermis displaced through the foramen magnum (not to be confused with tonsillar herniation – this is the vermis, not the tonsils)
Vermis and/or medulla may become kinked as they pass though the foramen magnum
Often associated with hydrocephalus, and it may be associated with a lumbar menigomyelocele
Dandy-Walker malformation
Posterior fossa is larger than normal and the vermis is absent or rudimentary
The 4th ventricle is cystically dilated and takes up the space where the vermis should be
Category: Pathology Notes
Subscribe to:
Post Comments (Atom)
POST COMMENT
0 comments:
Post a Comment