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Pinealoma is a tumor of the pineal gland.
Additional recommended knowledge
Frequently, paralysis of upward gaze along with several ocular findings known collectively as Parinaud's syndrome are the only physical symptom seen. This is caused by the compression of the vertical gaze center in the midbrain tectum at the level of the superior colliculus and cranial nerve III. Patients may also present with pupillary disturbances and eyelid retraction (Collier's sign).
A pinealoma may cause interruption of hypothalamic inhibiting pathways, sometimes leading to beta-hCG secretion and consequent Leydig's cell stimulation.
Pinealomas can be due to proliferation of primary pineocytes (pineocytomas, pineoblastomas), astrocytes (astrocytoma), or germ cells (germinoma). Germinomas are the most common tumor in the pineal gland.
Of the different types of pinealomas, the type with the most favorable prognosis is the pineocytoma. 
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Pinealoma". A list of authors is available in Wikipedia.|