Letter O
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OLIGEMIA
Decreased blood flow. Decreased blood flow in the brain can cause strokes.
OMENTUM
Layer of fat that surrounds the abdominal structures and organs in the abdomen.
OPACIFICATION
A term used on xray. Refers to an opacity or white spot that is abnormal.
OPACITY
A white spot seen on a chest x-ray. This may represent an area of infection, compressed lung (atelectasis) or inflammation. Also known as “density” or “infiltrate”.
OPERCULAR
Of or referring to the operculum.
OPERCULUM
Normal brain anatomy.
OPTIC
Of or referring to the eye or nerves of the eye.
OPTIC GLIOMA
A tumor arising from the nerve tissue of the optic nerve.
OPTIC NEURITIS
An inflammation or swelling of the large nerve going to the eye.
OPTIC TRACTS
Are white matter pathways where the nerve fibers of the eye travel through the brain.
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