A 5-Year-Old Caucasian Boy Is Brought to the Physician's Office

A 5-year-old Caucasian boy is brought to the physician's office with recent-onset gait instability and gait ataxia.  MRI of the brain shows a midline posterior fossa mass.  Biopsy of the mass reveals sheets of primitive cells and many mitotic figures.  This patient most likely suffers from which of the following?

A) Pilocytic astrocytoma
B) Glioblastoma
C) Oligodendroglioma
D) Ependymoma
E) Medulloblastoma
F) Primary CNS lymphoma
G) Meningioma
H) Craniopharyngioma
I) Schwannoma
J) Pituitary adenoma

Correct Answer:

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