Pineocytoma, is a rare, benign, slowly growing tumor of the pineal gland.

[3] Because of their massive growth, pineocytoma symptoms are related to increased intracranial pressure.

Some common symptoms of pineocytomas include Parinaud syndrome, headaches, dizziness, papilledema, tremors, ataxia, impaired vision, ambulation, ptosis, nausea, and vomiting.

No genetic mutations have been linked to pineocytomas however, there have been some associations with certain chromosomal abnormalities.

[4] Pineocytomas typically present on a CT scan as round and well-delineated masses with a diameter under 3cm.