1. Regarding juvenile pilocytic astrocytomas, which of the following is (are) true?
(X-type question - select all correct answers)
A) They are considered "astrocytoma grade I" according to the World Health Organization classification.
B) Cerebellar juvenile pilocytic astrocytomas almost invariably have an enhancing portion.
C) They account for the majority of brainstem gliomas.
D) They are typically solid when occurring in the cerebellum.
E) They tend to grow out of the fourth ventricular outlet foramina and are referred to as "plastic astrocytomas."
