Queston #14115Note

– most cases present in children < 10 years old and are located in the 4th ventricle 
– will have prominent perivascular pseduorosettes (fibrillary processes surrounding a vessel, creating a clearing between the tumor nuclei and the blood vessel) 


Medulloblastomas present in the 4th ventricle as well but will typically have hypercellular, tightly packed neoplastic cells and Homer-Wright rosettes