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( Sign (medicine))
A sign is an indication of some fact or quality; and a medical sign is an objective[1] indication of some medical fact or quality that is detected by a physician during a physical examination of a patient.[2] There is a strong implication that the signs have no meaning for a patient, and may not even be noticed by them; yet they are full of meaning for the physician, and are often significant in assisting a physician to identify the disease(s) responsible for the patient's symptoms. Examples include elevated blood pressure, a clubbing of the fingers (which may be a sign of lung disease, or many other things), and arcus senilis. The term sign is not to be confused with the term indication, which denotes a valid reason for using some treatment.
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