Thyroid Stimulating Immunoglobulin

Abbrev Code:TSIS   
Order Code:LAB746Order Name:Thyroid Stimulating Immunoglobulin
Synonyms:TSI; Gravis Disease
Methodology:Recombinant bioassay
CPT Codes: 84445 x1
Turnaround Time:Specimens are sent to reference laboratory Mon-Fri; results are reported within 2-6 days.

This test was developed and its performance characteristics determined by Laboratory Medicine and Pathology, Mayo Clinic. This test has not been cleared by the U.S. Food and Drug Administration.

Collection Instructions

Optimal Volume:1 mL
Minimum\Peds Volume:0.4 mL
Container:Red (no gel)
Alternate Containers: Red or gold (gel)
Causes for Rejection:Gross hemolysis.

Processing and Shipping

Specimen Processing:Centrifuge and aliquot 0.5 mL, 0.1 mL minimum. Store refrigerated or frozen.
Shipping Instructions:Ship frozen.
Stability:24 hours at room temperature; 7 days refrigerated; 60 days frozen (preferred).
Test Performed at or Referral Lab Lab Sendouts  (Mayo)
Referral Lab number:TSI


Reference Range:Less than or equal to 1.3 TSI index.
Use:The test is often used in the diagnosis of patients with normal routine thyroid tests, but in whom progressive exopthalemia and/or Grave's disease is still suspected.

Click HERE to Report test errors or omissions.
*If no email program is associated with this computer, please contact:
[email protected] for TestID: 2866"