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An optic nerve melanocytoma is a tumor made up of melanocytes and melanin. Melanocytomas are typically a benign meaning they can grow, but rarely transform into a malignancy. Even so, local growth can affect adjacent tissues. Most optic nerve melanocytomas are small, black, and do not grow.
Optic nerve sheath meningiomas (ONSM) are rare benign tumors of the optic nerve. 60–70% of cases occur in middle age females, and is more common in older adults (mean age 44.7 years). It is also seen in children, but this is rare. The tumors grow from cells that surround the optic nerve, and as the tumor grows, it compresses the optic nerve.
Within medical ophthalmology, Intraocular schwannoma, also termed uveal schwannoma, is a type of schwannoma (homogeneous tumor) found in the eye. These tumors are almost always benign in nature and while malignant forms have been documented in other areas of the body, this has not been reported in the uveal region.
Coloboma of optic nerve is a rare defect of the optic nerve that causes moderate to severe visual field defects. Coloboma of the optic nerve is a congenital anomaly of the optic disc in which there is a defect of the inferior aspect of the optic nerve. The issue stems from incomplete closure of the embryonic fissure while in utero.
Optic nerve (the nerve that connects the eye to the brain) A person can have coloboma in one or both eyes, and they may impact vision, depending on where they’re located, the U.S. National ...
Ocular disc dysplasia is the most notable ocular defect of the disease. An abnormal development in the optic stalk causes optic disc dysplasia, which is caused by a mutation in the Pax2 gene. [4] The nerve head typically resembles the morning glory disc anomaly, but has also been described as a coloboma. [4]
NAION is believed to be caused by reduced blood flow to the optic nerve head. It can lead to permanent visual loss in one eye that may develop painlessly and suddenly or over several days before ...
Related: 8-Year-Old Boy's Dream of Skydiving Finally Comes True After Lazy Eye Led to Terminal Cancer Diagnosis (Exclusive) Campbell was diagnosed with medulloblastoma, a type of brain tumor that ...
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