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. Author manuscript; available in PMC: 2012 Aug 11.
Published in final edited form as: J Neuropathol Exp Neurol. 2008 Mar;67(3):240–249. doi: 10.1097/NEN.0b013e318165eb75

FIGURE 1.

FIGURE 1

Histologic features of pilocytic astrocytoma (PA). Cross-sectional view of a PA that expands optic nerve fascicles (A) (hematoxylin and eosin; 100×). Intermediate power view highlighting numerous Rosenthal fibers (B) (hematoxylin and eosin; 200×). Loose architecture with microcysts and bipolar astrocytes is another characteristic feature of PA (C) (hematoxylin and eosin; 400×). Areas with increased cellularity may be present in some PAs of the optic nerve (D) (hematoxylin and eosin; 400×).