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Thyroglobulin Panel
Test CodeTGPNL
Alias/See Also
Thyroglobulin and Anti-Thyroglobluin Antibody
CPT Codes
84432 86800
Includes
Thryoglobulin level and Anti-Thyroglobulin Antibody
Preferred Specimen
1.0 mL of whole blood (1.0 mL of serum or plasma)
Minimum Volume
0.4 mL of whole blood (0.2 mL of serum or plasma)
Transport Container
Serum Separator (gold top), heparinized plasma (green or mint top), or no additive red top
Transport Temperature
Refrigerated
Specimen Stability
Room Temperature: 8 hours
Refrigerated: 3 days
Frozen: 2 months
Refrigerated: 3 days
Frozen: 2 months
Methodology
Chemiluminescent Immunometric Assay
Setup Schedule
Monday - Saturday.
Report Available
Report available in 24 hours.
Limitations
If a patient has a positive ATG the TG can be underestimated.
Clinical Significance
Thyroglobulin (Tg) is a secretory product only of the thyroid gland. The major clinical use of serum Tg measurement is to monitor, but not to diagnose, patients with well-differentiated thyroid cancers. The measurement of thyroglobulin, after thyroidectomy and ablation of the thyroid gland, is useful to determine metastasis. Deficient Tg synthesis is observed in infants with goitrous hypothyroidism.
