brain tumor

(brayn TOO-mer) Speaker

The growth of abnormal cells in the tissues of the brain. Brain tumors can be benign (not cancer) or malignant (cancer).

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

Figure

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

Anatomy of the inside of the brain, showing the pineal and pituitary glands, optic nerve, ventricles (with cerebrospinal fluid shown in blue), and other parts of the brain

Figure

Anatomy of the inside of the brain, showing the pineal and pituitary glands, optic nerve, ventricles (with cerebrospinal fluid shown in blue), and other parts of the brain.