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Thyroglobulin (TG-RIA)

Test ID: 

704305

CPT code:

84432, 86800

Synonyms:

Extended-storage Comprehensive Thyroglobulin (With Anti-Tg Screen and Reflex to RIA)
Thyroglobulin, Comprehensive (With Anti-Tg Screen and Reflex to RIA)

Clinical Use:

Comprehensive thyroglobulin can be used to monitor recurrence of thyroid cancer. All specimens are tested for the presence of antithyroglobulin autoantibodies (anti-Tg). Specimens negative for the presence of anti-Tg are reflexed to thyroglobulin testing by ICMA, and specimens positive for the presence of anti-Tg are reflexed to thyroglobulin testing by RIA.
Specimens submitted for comprehensive thyroglobulin testing are stored frozen for one year to allow for future testing.

Specimen Type:

Serum

Requested Volume: 

5 mL

Minimum Volume: 

1.5 mL

Container Type: 

Gel-barrier tube or red-top tube

Collection:

Transfer specimen to a plastic transport tube before freezing. Serum must be separated from cells within one hour of venipuncture. Submit serum in a plastic transport tube.

Storage Instructions:

Freeze

Stability Requirements:

Stable at room temperature for three days
or refrigerated for 14 days.
Stable when frozen for 3.75 years.
Freeze/thaw cycles: stable x2.

Rejection Criteria

Plasma specimen received; gross hemolysis

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