Médecine thérapeutique / Pédiatrie
MENUPosterior fossa malformations Volume 16, issue 3, Juillet-Août-Septembre 2013
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- Key words: cerebellum, malformation, MRI, posterior fossa
- DOI : 10.1684/mtp.2013.0490
- Page(s) : 193-202
- Published in: 2013
A classification of posterior fossa malformations based on cerebellar development, genetics, or molecular biology is a challenging task and unlikely to be realised in the near future. However, a classification based on anatomical features and associated morphological variation enhances the diagnosis of all such malformations. Several anatomical landmarks are useful to classify these malformations. A detailed study of subcutaneous tissue may reveal the presence of dermal sinus or meningoceles. Analysis of the mega cisterna magna and sub-arachnoid spaces may reveal Chiari malformation and all other cystic posterior fossa malformations, which include arachnoid cysts and Blake's pouch cyst. Finally, the vermian volume and associated fissures may reveal a diagnosis of Dandy Walker and vermian hypoplasia, dysplasia and atrophy.