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HelpTest Code LAB5107 Iron, Liver Tissue
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Reporting Name
Iron, Liver TsSpecimen Type
Liver TissueNecessary Information
Patient's date of birth is required to calculate iron index.
Specimen Required
Supplies: Metal Free Specimen Vial (T173)
Container/Tube:
Preferred: Mayo metal-free specimen vial
Acceptable: Paraffin block, with no more than 1 or 2 cuts previously made
Specimen Volume: 2 mg
Collection Instructions: Two mg of liver tissue are required. This is typically a piece of tissue from a 22-gauge needle biopsy at least 2 cm long. If an 18-gauge needle is used, the tissue must be at least 1 cm in length.
Additional Information: Paraffin blocks will be returned 7 days after analysis is complete.
Reject Due To
| All specimens will be evaluated at Mayo Clinic Laboratories for test suitability. |
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Liver Tissue | Refrigerated (preferred) | ||
| Ambient | |||
| Frozen | |||
Specimen Minimum Volume
Needle biopsy: See Specimen Required; 2 mm x 2 mm (punch): 0.3 mg by dry weight
Special Instructions
Day(s) Performed
Monday, Thursday
Specimen Retention Time
60 daysReport Available
3 to 6 daysReference Values
Iron
Males: 200-2,400 mcg/g dry weight
Females: 200-1,800 mcg/g dry weight
Iron Index
≥13 years: <1.0 mcmol/g/year
Reference values have not been established for patients that are younger than 13 years.
Useful For
Diagnosis of hemochromatosis using liver tissue specimens
Testing Algorithm
For more information see Hereditary Hemochromatosis Algorithm.
CPT Code Information
83540
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| FET | Iron, Liver Ts | 57028-3 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 8350 | Iron, Liver Ts | 57028-3 |
| 7770 | Hepatic Iron Index | 49061-5 |