G6SW - Overview: N-Acetylgalactosamine-6-Sulfatase, Leukocytes

Test Catalog

Test Name

Test ID: G6SW    
N-Acetylgalactosamine-6-Sulfatase, Leukocytes

Useful For Suggests clinical disorders or settings where the test may be helpful

Preferred test to rule-out mucopolysaccharidosis IVA (Morquio A syndrome)


The test is not useful to establish carrier status for Morquio A syndrome.

Genetics Test Information Provides information that may help with selection of the correct test or proper submission of the test request

Preferred test to rule-out mucopolysaccharidosis IVA, (MPS IVA, Morquio A syndrome).


Not recommended for carrier detection.


Morquio A is an autosomal recessive mucopolysaccharidosis caused by reduced or absent N-acetylgalactosamine-6-sulfate sulfatase (GALNS) enzyme activity.


Although clinically similar, Morquio A is genetically and enzymatically distinct from Morquio B. Enzyme analysis is necessary to distinguish between the 2.

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


NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.


Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name

N-Acetylgalactosamine 6 Slft, WBC

Aliases Lists additional common names for a test, as an aid in searching

Galactosamine-6-Sulfatase Deficiency
Morquoi A
Morquoi A Disease
Morquio Syndrome
Morquio Syndrome A
Morquio Syndrome Type A