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Microbiology Sources | Microbiology Tests | Anatomic Pathology | Cytopathology

Thyroid Stimulating Immunoglobulin

Source Blood
Mnemonic TSIG
Specimen Requirements

1 x 3.5 mL gold top SST tube

Minimum: 0.5 mL serum

CLS staff: collect specimen and transport to DSC Accession, who will forward specimen to Referrals.

Note to ordering physician: test requires review and approval by CLS Medical & Scientific Staff.  Please contact CLS Referrals 403-770-3285 for further information on the approval process.
Specimen Handling PSC & RRL:
Centrifuge, pour off, and transport serum on ice to DSC.

Extra-regional:
Centrifuge, pour off, and freeze serum prior to transport to DSC.

DSC:
Freeze specimens upon receipt in lab; ensure frozen specimens do not thaw.
Additional Information Test restricted to patients known to have positive results for Thyrotropin Receptor Antibodies.
Testing Location Mayo Clinic
Testing Frequency
Alternate Name(s) LATF (Long Acting Thyroid Stimulating Factor)
Reference Interval