What causes junctional scotoma?

2020-07-05 by No Comments

What causes junctional scotoma?

Junctional scotoma and the junctional scotoma of Traquair are visual field defects that arise from damage to the junction of the optic nerve and the optic chiasm. Sellar masses including pituitary tumors are the most common cause of these visual field defects.

What is a Chiasmal lesion?

Anatomical terms of neuroanatomy. Chiasmal syndrome is the set of signs and symptoms that are associated with lesions of the optic chiasm, manifesting as various impairments of the sufferer’s visual field according to the location of the lesion along the optic nerve.

What is altitudinal visual field defect?

Altitudinal visual field defect (VFD), which involves the loss of visual sensation in the horizontal half of the visual field, is caused mainly by anterior ischemic optic neuropathy (AION),1,2,3 or rarely by compressive neuropathy due to a tumor or aneurysm.

Is scintillating scotoma serious?

Scintillating scotomas are typically benign, meaning that they aren’t a cause for concern and they go away without treatment. Recurring scintillating scotomas can indicate other health conditions, such as migraine, glaucoma, multiple sclerosis, and preeclampsia.

How is scotoma treated?

Typically, scintillating scotomas don’t require treatment. In most cases, the blind spot will resolve on its own within about an hour. Lying down to rest, closing your eyes, drinking water, and taking an over-the-counter pain reliever, such as ibuprofen or acetaminophen, may help to relieve mild symptoms of scotomas.

What is visual scotoma?

A scotoma is an aura or blind spot that obstructs part of your vision. Scintillating scotomas are blind spots that flicker and waver between light and dark. Scintillating scotomas are typically not permanent. But they can be an indicator of an underlying health condition.

What is scotoma visual defect?

How do you treat scintillating scotoma?

Which is the correct definition of junctional scotoma?

● A “junctional scotoma” is a visual field defect that localizes to the posterior optic nerve at the junction with the optic chiasm.

How is a junctional nevus different from melanoma?

The most important task is to differentiate a nevus from a malignant melanoma. Regular brown color, surface, and border are characteristic features of a nevus that differentiate it from melanoma. A junctional nevus may appear similar to other pigmented macules, such as a lentigo or freckle.

What kind of melanoma is dysplastic nevus associated with?

DDx Dysplastic nevus, abbreviated DN, is a common melanocytic lesion that is closely associated with malignant melanoma . It is also known as atypical nevus, dysplastic melanocytic nevus, Clark nevus, and nevus with architectural disorder .

What does a 3 year old junctional nevus look like?

Junctional nevus in a 3-year-old child presents as an asymptomatic pigmented lesion of the attached gingiva . This was noted by the mother within the 1st year of life. High-power photomicrograph of a junctional nevus shows abundant melanin pigment within the basal cells.