Thyroid Laboratory Studies:

  • T4
  • T3 Uptake
  • Free T4 Index
  • Total T3
  • Free T3 Index
  • TSH
  • Thyroid antibodies:
    • Antithyroglobulin
    • Thyroid Peroxidase

Thyroid ultrasound evaluation:

  • Structural and vascular evaluation of the thyroid gland by ultrasonography


  • Fine-needle aspiration-biopsy of thyroid nodules to evaluate for thyroid cancer (cytology is sent to a reference laboratory for evaluation; molecular studies are done by a reference laboratory when needed).

Thyroid Laboratory Studies

Thyroid Ultrasound and Thyroid Fine-Needle Aspiration-Biopsy

The Relationship Between the Thyroid and Pituitary