Tay-Sachs Test: Results
Content provided by Healthwise
Results
The test for Tay-Sachs disease measures the amount of an enzyme called hexosaminidase A (hex A) in the blood.
Normal
Enzyme measured | Value | |
|---|---|---|
Amount in blood | Total hexosaminidase (A+B): | 9.9–15.9 units per liter (U/L) |
Amount in blood | Hexosaminidase A: | 7.5–9.8 units per liter (U/L) |
- Normal values vary depending on the laboratory and test method used. Check with your doctor for normal values.
- A person who has about half the normal amount of hex A is a Tay-Sachs carrier.
- A person who does not have any hex A has Tay-Sachs disease.
- In rare cases, a person may not have either hex A or hex B enzyme. This causes a more severe condition called Sandhoff's disease.
| Last updated: | March 31, 2008 |
|---|---|
| Author: | Debby Golonka, MPH |
| Reviewed By: | Michael J. Sexton, MD - Pediatrics, Siobhan M. Dolan, MD, MPH - Reproductive Genetics |
| Editors: | Susan Van Houten, RN, BSN, MBA, Tracy Landauer |
© 1995-2007, Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
This information is not intended to replace the advice of a doctor. By using AOL Body, you indicate that you have read, understood, and agreed to our Terms of Service, and AOL Body Advertising Policy. Read more about our content partners.
Search
Where Does it Hurt?
If you're experiencing aches and pains we can help you find answers. Find out what your symptoms mean for your health.
