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Pilocytic Astrocytoma

slide 9 of 19


Comments:
The nuclei of pilocytic astrocytomas are generally oval and have a bland appearance. Some cases show degenerative-type atypia; however, mitotic activity is not increased. Rare cases may undergo malignant transformation, usually after radiation therapy. Such cases show pseudopalisading necrosis, hypercellular foci, and increased proliferative activity.

slide 9 of 19