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Test ID: ARSU    
Arylsulfatase A, 24 Hour, Urine

Secondary ID A test code used for billing and in test definitions created prior to November 2011


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


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

Detection of metachromatic leukodystrophy

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



Metachromatic leukodystrophy (MLD) presents with progressive neurologic changes and leukodystrophy with variable age of onset.


Arylsulfatase A enzyme levels are decreased in individuals with MLD, and excessive amounts of sulfatides are present in urine.


Decreased arylsulfatase A enzyme levels can be seen in unaffected individuals who have a pseudodeficiency of arylsulfatase A.

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

Colorimetric, Enzyme Assay

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

Arylsulfatase A, U

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

ARSA Deficiency
Arylsulfatase A Deficiency
Metachromatic Leukodystrophy