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Test Catalog

Test ID: XAN    
Xanthine and Hypoxanthine, 24 Hour, Urine

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 and confirmation of xanthinuria


Evaluation of low serum or urine uric acids


Evaluation of allopurinol treatment in hyperuricemic disorders (eg, Lesch-Nyhan syndrome)

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

Diagnosis and confirmation of xanthinuria and evaluation of allopurinol treatment in hyperuricemic disorders.

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

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

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

Xanthine and Hypoxanthine, U

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

Combined Deficiency of Sulfite Oxidase, Xanthine Dehydrogenase, and Aldehyde Oxidase
Molybdenum Cofactor Deficiency
Xanthine Dehydrogenase Deficiency
Xanthine Oxidase Deficiency
XDH Deficiency