THYROGLOBULIN, TUMOR MARKER, SERUM
Reporting Title: Thyroglobulin, Tumor Marker, S
Immunoenzymatic Assay
All specimens are screened for the presence of autoantibody to thyroglobulin.
	Test Performed At:
		Mayo Medical Laboratories #83069
	Specimen Required:
		Collect 3.0 mL (minimum 2.0 mL) of whole blood in a plain, red-top tube(s) or a serum gel tube(s).
		NOTE:			The test is most sensitive for detection of thyroid cancer recurrence when the patients are off thyroid replacement long enough to have an elevated thyroid-stimulating hormone prior to drawing the specimen.
	Laboratory Notes:
		Spin down and send 1.0 mL (minimum 0.8 mL) of serum refrigerated.
		NOTES:			1.		Reject if grossly hemolyzed
					2.		Will also accept heparin plasma.
	Reference Values:
		THYROGLOBULIN ANTIBODY SCREEN
			<4.0 IUnits/mL
		A thyroglobulin antibody result of <4.0 IU/mL is unlikely to cause clinically significant thyroglobulin assay interference. It is recommended that the thyroglobulin result be reviewed for concordance with clinical presentation.
		THYROGLOBULIN, Tumor Marker
			³16 years:
				£33 ng/mL
				Athyrotic individuals normally have human thyroglobulin values less than 5 ng/mL.
		CAUTION:				Thyroid autoantibodies may interfere with the measurement of Tg. All specimens are prescreened for antibodies and a comment appended to the report if they are present. Undetectable levels of Tg should be interpreted with caution if anti-Tg is present. Specimens with thyroglobulin concentrations >250,000 ng/mL may give falsely lower results.
	Day(s) Test Set Up:
		Monday - Saturday
	Cut-Off Time:
	Turn Around Time:
		3-5 days
	CPT Code:
		84432 – thyroglobulin, tumor marker
		86800 - thyroglobulin antibody
	Care Manager Order Name:
		Thyroglobulin, Serum ONCE RTN
	KIDDOS Order Name:
		Thyroglobulin Serum
	Cerner Order Name:
		Thyroglobulin, S

 Last updated 03/09