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Test Code LAB3 Iron, Liver Tissue

Additional Codes

Iron Liver Ts

Reporting Name

Iron, Liver Ts
Seattle Children's Hospital Note:

SCH Clinical System Name: Iron, Liver Tissue

Useful For

Diagnosis of hemochromatosis using liver tissue specimens


Necessary 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 Type

Liver Tissue

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 

Day(s) Performed

Monday, Thursday

Seattle Children's Hospital Note:

TAT: 4 - 7 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Method Name

Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

Method Description

The metal of interest is analyzed by inductively coupled plasma mass spectrometry.(Unpublished Mayo method)

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.

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

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

Testing Algorithm

For more information see Hereditary Hemochromatosis Algorithm.

Report Available

3 to 6 days

Reject Due To

All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.
Seattle Children's Hospital Additional Information:

Aliases: Fe (Iron); Hemochromatosis; Hepatic Iron Concentration; Hepatic Iron Index; Iron (Fe); Iron, Tissue Liver; Metals, Tissue; Quantitative Iron; Total Iron, Liver Tissue