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Test ID SORBU Sorbitol and Mannitol, Quantitative, Random, 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: 2 mL

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.

Useful For

Monitoring effectiveness of treatment in patients with phosphomannomutase 2 deficiency (PMM2-CDG)


Establishing a baseline level prior to initiating treatment for PMM2-CDG


This test is not useful for diagnosing congenital disorders of glycosylation (CDG) in general or PMM2-CDG in particular

Method Name

Gas Chromatography-Mass Spectrometry (GC-MS)

Reporting Name

Sorbitol and Mannitol, QN, U

Specimen Type


Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 28 days
  Frozen  28 days

Reference Values

Mannitol: <97 mmol/mol creatinine

Sorbitol: <35 mmol/mol creatinine

Day(s) Performed


Report Available

3 to 9 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 US Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
SORBU Sorbitol and Mannitol, QN, U 74447-4


Result ID Test Result Name Result LOINC Value
614936 Mannitol 47698-6
614935 Sorbitol 48152-3
614937 Interpretation 59462-2
614938 Reviewed By 18771-6

NY State Approved