Pediatric posterior fossa tumor

Approximately half of pediatric central nervous system tumors are located in the posterior fossa.

Pilocytic astrocytomas (PAs), medulloblastomas (MBs), and ependymomas are the most common posterior fossa tumors.

High-grade gliomas, atypical teratoid/rhabdoid tumor, and choroid plexus papilloma of the fourth ventricle are less frequent.

Because of the different treatment options and variability in long-term outcome, an accurate and specific diagnosis is mandatory 1).

Posterior fossa tumors tend to entail obstructive hydrocephalus, and urges initiating prompt treatment.


1)
Poretti A, Meoded A, Huisman TA. Neuroimaging of pediatric posterior fossa tumors including review of the literature. J Magn Reson Imaging 2012;35:32–47.
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