NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,804 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

CNS
The brain and spinal cord. Also called central nervous system.

EnlargeDrawing of brain anatomy showing the brain stem, pons, medulla, spinal cord, cerebellum, cerebrum, meninges, ventricles (fluid-filled spaces), and skull.

Anatomy of the brain, showing the cerebrum, cerebellum, brain stem, and other parts of the brain.