NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,468 terms related to cancer and medicine.
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- listen (PA-pil-eh-DEE-muh)
- Swelling around the optic disk, the area where the optic nerve (the nerve that carries messages from the eye to the brain) enters the eyeball. Papilledema occurs when increased brain pressure caused by tumors or other problems results in swelling of the optic nerve.