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    GlossaryErythrocyte Sedimentation Rate (ESR)

    measures how quickly red blood cells settle in a test tube

    The Erythrocyte Sedimentation Rate (ESR) is a blood test that measures how quickly red blood cells (erythrocytes) settle at the bottom of a test tube over a specified period, usually one hour. A higher-than-normal sedimentation rate can indicate inflammation in the body, which may be due to various conditions such as infections, autoimmune diseases, or cancers.

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