Test ID: HEXKM
Tay-Sachs Disease, HEXA Gene, Known Mutation
Secondary ID 
A test code used for billing and in test definitions created prior to November 2011
Useful For Suggests clinical disorders or settings where the test may be helpful
Carrier testing of individuals for Tay-Sachs disease (TSD) when familial mutations have been previously identified
Diagnostic confirmation of TSD when familial mutations have been previously identified
Prenatal testing when 2 familial mutations have been previously identified in an affected family member
Genetics Test Information Provides information that may help with selection of the correct test or proper submission of the test request
Documentation of the specific familial mutation(s) must be provided with the specimen in order to perform this test.
Reflex Tests Lists test(s) that may or may not be performed, at an additional charge, depending on the result and interpretation of the initial test(s)
| Test ID | Secondary ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|---|
| FBC | 80333 | Fibroblast Culture for Genetic Test | Yes | No |
| AFC | 80334 | Amniotic Fluid Culture/Genetic Test | Yes | No |
Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.
Note: This testing algorithm only applies to prenatal testing.
If amniotic fluid (non-confluent cultured cells) is received, amniotic fluid culture/genetic test will be added and charged separately. If chorionic villus specimen (non-confluent cultured cells) is received, fibroblast culture for genetic test will be added and charged separately.
Special Instructions and Forms Describes specimen collection and preparation information, test algorithms, and other information pertinent to test. Also includes pertinent information and consent forms to be used when requesting a particular test
Method Name A short description of the method used to perform the test
HEXKM/89283: Polymerase chain reaction (PCR) amplification/DNA sequencing are utilized to test for the presence of a specific mutation(s) in the HEXA gene previously identified in an affected family member.
FBC/80333, AFC/80334: Cell Culture
(PCR is utilized pursuant to a license agreement with Roche Molecular Systems. Inc.)
Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name
Aliases Lists additional common names for a test, as an aid in searching
Hexosaminidase A
Tay-Sachs
Tay-Sachs disease (TSD)
TSD (Tay-Sachs disease)
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