NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,942 terms related to cancer and medicine.

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anesthesia
(A-nes-THEE-zhuh)
A loss of feeling or awareness caused by drugs or other substances. Anesthesia keeps patients from feeling pain during surgery or other procedures. Local anesthesia is a loss of feeling in one small area of the body. Regional anesthesia is a loss of feeling in a part of the body, such as an arm or leg. General anesthesia is a loss of feeling and a complete loss of awareness that feels like a very deep sleep.