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Tay-Sachs Test

Test Overview

This test for Tay-Sachs disease measures the amount of an enzyme called hexosaminidase A (Hex A) in the blood. Hex A breaks down compounds called gangliosides in the brain and nerves. Tay-Sachs is an inherited disease in which the body can't break down gangliosides as it should, so they collect in the nerve cells of the brain and spinal cord and cause damage.

Tay-Sachs can occur when parents pass on a changed gene to their child.

  • If the changed gene is from both parents, the baby will get the disease.
  • If the changed gene is from only one parent, the baby will be a carrier, Opens dialog. This means that the child will have one gene that produces Hex A and one that doesn't. The child's body makes enough Hex A so they won't get the disease. But the child can pass the changed gene on to their children.

The Tay-Sachs enzyme test is usually done on a blood sample.

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This information does not replace the advice of a doctor. Ignite Healthwise, LLC, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.

This information does not replace the advice of a doctor. Ignite Healthwise, LLC, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.

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