NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,989 terms related to cancer and medicine.

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Horner syndrome
(...SIN-drome)
A condition in which one side of the face is flushed, does not produce sweat, and has a constricted pupil and drooping eyelid. It can be caused by an injury to, or paralysis of, nerves in the neck, or by a tumor.