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HelpTest Code FET Iron, Liver Tissue
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen 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.
Specimen Minimum Volume
Needle biopsy: See Specimen Required; 2 mm x 2 mm (punch): 0.3 mg by dry weight
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Liver Tissue | Refrigerated (preferred) | ||
| Ambient | |||
| Frozen | |||
Reference 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.
Day(s) Performed
Monday, Thursday
CPT Code Information
83540
Report Available
3 to 6 daysSpecimen Retention Time
60 daysReject Due To
| All specimens will be evaluated at Mayo Clinic Laboratories for test suitability. |