Here is a cystic astrocytoma of the cerebellum in a child. Most childhood brain tumors arise below the tentorium, which is the reverse of the adult. Gliomas in children, therefore, are most common in the posterior fossa. Childhood astrocytomas are often cystic (so-called "juvenile astrocytomas"). [Image contributed by Jeannette J. Townsend, MD, University of Utah]

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