NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,957 terms related to cancer and medicine.

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aniridia
(A-nih-RIH-dee-uh)
A disorder in which a person is born without part or all of the iris (colored tissue at the front of the eyeball). Aniridia usually affects both eyes and causes other eye problems, including being sensitive to light and loss of vision.