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HelpTest Code STERSO Sterols, Plasma
Additional Codes
Mayo Test Code: STER
Reporting Name
Sterols, PUseful For
Investigation of possible desmosterolosis (desmosterol reductase deficiency), cerebrotendinous xanthomatosis, lathosterolosis, sitosterolemia, sterol C4 methyl oxidase deficiency, MEND (male EBP disorder with neurologic defects) syndrome, and X-linked chondrodysplasia punctata 2
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
PlasmaNecessary Information
Biochemical Genetics Patient Information (T602) is recommended, but not required, to be filled out and sent with the specimen to aid in the interpretation of test results.
Specimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube:
Preferred: Green top (sodium or lithium heparin)
Acceptable: Lavender top (EDTA), pearl white top (EDTA plasma gel), yellow top (ACD solution A or B)
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL plasma
Collection Instructions:
1. Centrifuge specimen and aliquot plasma into plastic vial.
2. Send plasma frozen.
Specimen Minimum Volume
Plasma: 0.1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Plasma | Frozen (preferred) | 92 days |
| Refrigerated | 28 days | |
| Ambient | 14 days |
Reference Values
7-dehydrocholesterol
≤2.0 mg/L
8-dehydrocholesterol
≤0.3 mg/L
8(9)-cholestenol
≤5.0 mg/L
Campesterol
≤8.0 mg/L
Cholestanol
≤6.0 mg/L
Desmosterol
≤2.5 mg/L
Dihydro T-Mas
≤0.3 mg/L
Lathosterol
≤6.0 mg/L
Sitosterol
≤15.0 mg/L
Squalene
≤1.0 mg/L
Stigmasterol
≤0.5 mg/L
Day(s) Performed
Tuesday, Friday
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
82542
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| STER | Sterols, P | 75858-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 29942 | Interpretation | 59462-2 |
| 610622 | 7-Dehydrocholesterol | 33275-9 |
| 610623 | 8-Dehydrocholesterol | 34671-8 |
| 610620 | 8(9)-Cholestenol | 100424-1 |
| 50501 | Campesterol | 75738-5 |
| 113381 | Cholestanol | 2082-6 |
| 50499 | Desmosterol | 75739-3 |
| 610621 | DiHydro T-MAS | 100425-8 |
| 50500 | Lathosterol | 75740-1 |
| 50502 | Sitosterol | 75741-9 |
| 610618 | Squalene | 100426-6 |
| 610619 | Stigmasterol | 100427-4 |
| 29944 | Reviewed By | 18771-6 |
Cautions
Reference values were derived using fasting specimens from healthy individuals. Sitosterol and campesterol values may be mildly elevated in individuals whose diets include foods with high concentrations of plant sterols, such as some vegetable oils and infant formulas.
Desmosterol may be elevated in individuals on medications containing amiodarone.(1)
Mild elevations of 7-dehydrocholesterol and 8-dehydrocholesterol may be observed in individuals taking certain antidepressant and/or antipsychotic medications such as aripiprazole and trazodone.(2)
Patients with primary dyslipidemias may also have altered cholesterol metabolism and mild elevations of sterols.(3)
Report Available
3 to 7 daysSpecimen Retention Time
1 monthReject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
| Gross icterus | OK |
Method Name
Gas Chromatography Mass Spectrometry (GC-MS)
Forms
1. Biochemical Genetics Patient Information (T602)
2. If not ordering electronically, complete, print, and send a Biochemical Genetics Test Request (T798) with the specimen.