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What is optic nerve melanocytoma?

What is optic nerve melanocytoma?

Optic nerve melanocytoma is a benign variant of melanocytic nevus that is located within or adjacent to the optic nerve. Optic nerve melanocytomas are benign tumors but may cause vision loss and visual field defects. Rarely, these tumors may undergo malignant transformation.

Is melanocytoma melanoma?

While the melanocytoma is generally considered to be a benign tumor, it has a potential for growth, recurrence, and transformation to a malignant melanoma. Because malignant transformation is rare, optical melanocytomas can usually be observed.

How common are melanocytomas?

Melanocytoma is a rare benign pigmented neoplasm that may occur anywhere in the uvea. It often affects the optic nerve head, but may even involve the adjacent retina and choroid in some cases. It is believed to be a congenital and non-hereditary lesion.

Is melanocytoma benign or malignant?

Melanocytoma is a rare benign tumor of melanocytes.

What is iris melanocytoma?

Melanocytoma is a form of nevus that can occur in and behind the iris in the ciliary body. In the image seen below, this melanocytoma has a cobblestone textured surface and feathered margins. Interestingly, it is also causing a small amount of pupillary distortion (correctopia).

Are optic nerve tumors cancerous?

Optic nerve gliomas are benign (non-cancerous) brain tumors that grow on the nerves that carry vision from the eyes to the brain (the optic nerves). Optic nerve gliomas are found in approximately one in five children with NF1.

What causes Melanocytoma?

The exact cause of all melanomas isn’t clear, but exposure to ultraviolet (UV) radiation from sunlight or tanning lamps and beds increases your risk of developing melanoma. Limiting your exposure to UV radiation can help reduce your risk of melanoma.

How does iridology work?

Iridology assumes that all bodily organs are represented on the surface of the iris via intricate neural connections5 and that dysfunction of most organs is marked on the iris, usually as a pigmentary change; the right half of the body is represented in the right iris, the left half in the left iris.

Are iris freckles rare?

About half of all people have iris freckles. Some types of nevi form before birth, while iris freckles are more likely to show up in older adults.