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Test ID SSCTU S-Sulfocysteine Panel, Urine

Necessary Information

Patient's age is required.

Specimen Required

Supplies: Urine Tubes, 10 mL (T068)

Container/Tube: Plastic, 10-mL urine tube

Specimen Volume: 3 mL

Collection Instructions: Collect a random urine specimen.

Useful For

Diagnosis of molybdenum cofactor deficiency, isolated sulfite oxidase deficiency and hereditary xanthinuria


Monitoring patients with molybdenum cofactor deficiency or isolated sulfite oxidase deficiency on treatment


This test provides a quantitative report of s-sulfocysteine, xanthine, hypoxanthine and uric acid identified via liquid chromatography-mass spectrometry.

Method Name

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

Reporting Name

S-Sulfocysteine Panel, U

Specimen Type


Specimen Minimum Volume

2 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Frozen 90 days

Reference Values

S-Sulfocysteine panel, urine

Reference values

(all results reported as mmol/mol creatinine)


0-3 years

4-6 years

7-12 years

13-18 years

>18 years













Uric Acid












Day(s) Performed

Tuesday, Thursday

Report Available

3 to 7 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
SSCTU S-Sulfocysteine Panel, U 94397-7


Result ID Test Result Name Result LOINC Value
607007 Interpretation (SSCTU) 59462-2
607002 Hypoxanthine 38366-1
607003 Xanthine 38371-1
607004 Uric Acid 34385-5
607005 S-Sulfocysteine 33876-4
607006 Reviewed By 18771-6

NY State Approved