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Pilocytic Astrocytoma : Rosenthal fibers

slide 8 of 19

Comments:
One of the histologic features of pilocytic astrocytomas is the presence of brightly eosinophilic, corkscrew-shaped Rosenthal fibers (shown here). Another useful diagnostic feature is PAS+ve eosinophilic granular bodies.

slide 8 of 19