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Questions About Cancer? 1-800-4-CANCER

NCI Dictionary of Cancer Terms

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yin and yang  listen  (yin ... yang)

  In Chinese philosophy, yin and yang are opposite forces that form a whole. Everything contains both yin and yang in a balance that is always changing, such as hot and cold, day and night, and health and disease. In traditional Chinese medicine, disease is diagnosed and treated based on the balance of yin and yang.