Esthesioneuroblastoma

* Arises from neuroectodermal cells along cribriform plate, nasal septum, superior turbenates, ethmoid air cells.

* Very aggressive and malignant, extends through the cribriform plate and may see the CSF.

* A form of PNET like medulloblastoma and pineoblastoma.

* May present as cystic mass intracranially.

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