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Test ID: ANAT    
Alpha-N-Acetylglucosaminidase, Fibroblasts

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

Diagnosis of Sanfilippo syndrome, type B (mucopolysaccharidoses, type IIIB)

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

Diagnostic enzyme assay for Sanfilippo syndrome, type B.


This test is used for the diagnosis of mucopolysaccharidoses (MPS) IIIB (Sanfilippo syndrome type B) only.


Sanfilippo types A, C, and D must be ruled out independently.


This test is not suitable for carrier detection.

Additional Tests Lists test(s) that are always performed, at an additional charge, with the initial test(s)

Test IDReporting NameAvailable SeparatelyAlways Performed
FIBRFibroblast CultureYesYes
CRYOBCryopreserve for Biochem StudiesNoYes

Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.

When this test is ordered, a fibroblast culture and cryopreservation for biochemical studies will always be performed at an additional charge. However, for multiple lysosomal enzyme assays on a patient utilizing fibroblast culture, only 1 culture is required regardless of the number of enzyme assays ordered. If viable cells are not obtained within 10 days, client will be notified.

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

ANAT: Colorimetric Enzyme Assay

FIBR: Cultivated from Biopsy as Monolayer

CRYOB: Fibroblast Subculture Followed by Cryopreservation and Storage

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

A-N-Acetylglucosaminidase, Fibro

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

Acetylglucosaminidase, Alpha-N
Mucopolysaccharidosis IIIB
N-Acetyl-Alpha-D-Glucosaminidase Deficiency
NAGLU Deficiency
Sanfilippo Syndrome B
Sanfilippo Syndrome Type B
Sanfilippo Type B