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Washington University Experience | NEOPLASMS (PINEAL) | Pineocytoma | 9C4 Pineocytoma w neuronal diffn (Case 9) NeuN 2.jpg
NeuN labels scattered tumor cells with a neurocytic or gangliocytoid appearance (NeuN IHC)
Ancillary data (not shown):
GFAP staining illustrates scattered positive processes dispersed amongst the tumor cells, and likely represents a reactive astrocytic component.
Ki67 proliferative index is generally low, with only rare small foci of slightly increased staining.
CD34 staining is restricted to blood vessels.
