Surgical Management of Pilocytic Astrocytoma of the Optic Nerve: A Case Report and Review of the Literature

Figure 7

Images of histopathologic examination of the surgical specimen. (a) Hematoxylin-eosin staining represents a solid tumor with several cells showing a vortical pattern. (b) Tumor cells show intense S-100-specific immunoreaction. (c) The smooth muscular actin- (SMA-) specific immunoreaction is practically negative. (d) The neuron-specific enolase- (NSE-) specific immunoreaction represents a strong granular cytoplasmic positivity.

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