Diagnostic finding

Decreased TSH

A serum thyroid-stimulating hormone (TSH) concentration below the established reference range (0.4–4.0 mIU/L).

Causes

  • Primary hyperthyroidism

    • Graves' disease

    • Toxic thyroid nodules

    • Thyroiditis

  • Exogenous thyroid hormone excess

    • Levothyroxine

    • Amiodarone

    • Lithium

  • Central hypothyroidism

    • Pituitary tumor

    • Hypothalamic tumor

Also known as: Low thyroid-stimulating hormone, Low TSH, Reduced TSH

Referencing diagnoses

Note: Lists existing diagnoses in Diagnotize only.