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Pinealoma

**Pinealoma**
*Classification & external resources*

Pineocytoma
ICD-10	D44.5
ICD-9	237.1, 194.4
ICD-O:	M9360/1
DiseasesDB	10044
eMedicine	med/2911
MeSH	D010871

Pinealoma is a tumor of the pineal gland.

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1 Presentation
2 Etiology
3 Prognosis
4 References
5 Additional images

Presentation

The pineal gland produces the hormone melatonin which plays a role in regulating circadian rhythms. A pinealoma may disrupt production of this hormone, and insomnia may result.

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.

Other symptoms may include hydrocephalus, gait disturbances, and precocious puberty.

Etiology

Pinealomas can be due to proliferation of primary pineocytes (pineocytomas, pineoblastomas), astrocytes (astrocytoma), or germ cells (germinoma).^[1] Germinomas are the most common tumor in the pineal gland.

Prognosis

Of the different types of pinealomas, the type with the most favorable prognosis is the pineocytoma. ^[2]

References

^ eMedicine - Germinoma, Central Nervous System : Article by Daniel D Mais, MD. Retrieved on 2007-12-03.
^ Deshmukh VR, Smith KA, Rekate HL, Coons S, Spetzler RF (2004). "Diagnosis and management of pineocytomas". Neurosurgery 55 (2): 349–55; discussion 355–7. PMID 15271241.

Additional images

v • d • e Nervous tissue tumors (ICD-O 9350-9589)
Miscellaneous tumors (9350-9379)	Craniopharyngioma - Pinealoma - Chordoma
Glioma (9380-9489)	Gliomatosis cerebri - Oligoastrocytoma - Choroid plexus papilloma - Ependymoma - Astrocytoma (Pilocytic astrocytoma, Glioblastoma multiforme) - Dysembryoplastic neuroepithelial tumour - Oligodendroglioma - Medulloblastoma - Primitive neuroectodermal tumor
Neuroepitheliomatous (9490-9529)	Ganglioneuroma - Neuroblastoma - Atypical teratoid rhabdoid tumor - Retinoblastoma - Esthesioneuroblastoma
Meningiomas (9530-9539)	Meningioma
Nerve sheath tumor (9540-9579)	Neurofibroma (Neurofibrosarcoma, Neurofibromatosis) - Schwannoma - Neurinoma - Acoustic neuroma - Neuroma
see also brain tumors (though not all brain tumors are of nervous tissue)

Category: Diseases

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.