Pineocytomas

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

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