Food Panel IgG4 (532)
Use
The Food Panel IgG4 test is utilized in specific clinical situations to identify foods that might be evaluated through diet elimination and challenge in patients with food-related complaints. The test provides data on the presence of food-specific IgG4 antibodies, which have been investigated in the context of oral food immunotherapy treatments. However, it is important to note that reference ranges for food-specific IgG4 have not been established, and the clinical utility of these tests remains unclear.
Special Instructions
Not provided.
Limitations
Reference values for food-specific IgG4 have not been established, limiting the interpretation of results. The clinical utility of these tests has not been clearly defined. Cutoffs for IgG4 presence are not standardized, and results should be considered as part of a broader clinical assessment rather than definitive indicators.
Methodology
Immunoassay (ImmunoCAP)
Biomarkers
LOINC Codes
- 56231-4 - Corn IgG4-mCnc
- 56253-8 - Egg White IgG4-mCnc
- 56254-6 - Egg Yolk IgG4-mCnc
- 56234-8 - Cow Milk IgG4-mCnc
- 56351-0 - Peanut IgG4-mCnc
- 56390-8 - Soybean IgG4-mCnc
- 56417-9 - Wheat IgG4-mCnc
- 56449-2 - Baker's yeast IgG4-mCnc
Result Turnaround Time
3-7 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.5 mL
Container
Plastic vial
Collection Instructions
Draw blood in a plain red-top tube(s), serum gel tube(s) is acceptable. Spin down and send 1 mL of serum refrigerated in a plastic vial.
Storage Instructions
Refrigerated (preferred): 28 days; Ambient: 7 days; Frozen: 365 days
Causes for Rejection
Hemolysis: Mild OK; Gross Reject, Lipemia: Mild OK; Gross Reject, Icterus: Mild OK; Gross Reject
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |
| Refrigerated | 28 days |
| Frozen | 365 days |