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Pineocytoma - high mag.jpg
Micrograph of a pineocytoma. HPS stain.
Classification and external resources
Specialty oncology
ICD-10 C75.3
ICD-O M9361/1
MeSH D010871

Pineocytoma, also known as a pinealocytoma, is a benign, slowly growing tumor of the pineal gland. Unlike the similar condition pineal gland cyst, it is uncommon.


Pineocytomas are diagnosed from tissue, i.e. a brain biopsy.

They consist of:

Pineocytomatous/neurocytic rosettes are superficially similar to Homer Wright rosettes; however, they differ from Homer Wright rosettes as they have (1) more neuropil at centre of the rosette and, (2) the edge of neuropil meshwork irregular/undulating.

See also[edit]


  1. ^ Wippold FJ, Perry A (March 2006). "Neuropathology for the neuroradiologist: rosettes and pseudorosettes". AJNR Am J Neuroradiol. 27 (3): 488–92. PMID 16551982.