CDGF - Specimen: Celiac Disease Gluten-Free Cascade

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Test ID: CDGF    
Celiac Disease Gluten-Free Cascade

Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.

If HLA-DQ typing is positive or equivocal for DQ2 or DQ8, then IgA, tissue transglutaminase (tTG) IgA and IgG, and deamidated gliadin IgA and IgG will be performed at an additional charge.


The following algorithms are available in Special Instructions:

-Celiac Disease Comprehensive Cascade

-Celiac Disease Diagnostic Testing Algorithm

-Celiac Disease Gluten-Free Cascade

-Celiac Disease Routine Treatment Monitoring Algorithm

-Celiac Disease Serology Cascade

Specimen Type Describes the specimen type needed for testing

Whole Blood ACD-B

Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Blood and serum are required.


Specimen Type: Blood

Container/Tube: Yellow top (ACD solution B)

Specimen Volume: 6 mL

Collection Instructions: Do not transfer blood to other containers.



Preferred: Serum gel

Acceptable: Red top

Specimen Volume: 2 mL

Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.

Blood: 3 mL/Serum 1.5 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected


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Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.

Specimen TypeTemperatureTime
SerumRefrigerated (preferred)7 days
 Frozen 14 days
Whole Blood ACD-BRefrigerated (preferred)