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HelpTest Code FACT Filamentous-Actin (F-actin) Antibody, IgG, Serum
Specimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Useful For
Evaluation of patients with hepatitis of unknown origin associated with hypergammaglobulinemia and/or abnormal liver enzymes
This test may also be useful for confirming positivity for smooth muscle antibodies.
Method Name
Enzyme-Linked Immunosorbent Assay (ELISA)
Reporting Name
F-Actin Ab, IgG, SSpecimen Type
SerumSpecimen Minimum Volume
0.4 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 21 days | |
| Frozen | 21 days |
Reject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
| Gross icterus | OK |
| Heat treated specimens | Reject |
Reference Values
Negative: <20.0 U
Weak Positive: 20.0-30.0 U
Positive: >30.0 U
Day(s) Performed
Monday
Report Available
2 to 8 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
83516
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| FACT | F-Actin Ab, IgG, S | 44706-0 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| FACT | F-Actin Ab, IgG, S | 44706-0 |
Testing Algorithm
For more information see First-Line Screening for Autoimmune Liver Disease Algorithm.