A 35-year-old woman is found to have suppressed TSH (0.01 mU/L) and elevated free T4 during routine screening; she is asymptomatic. Technetium scan shows diffusely increased uptake. Anti-TSH receptor antibodies are positive. Which of the following represents the strongest indication to start treatment in subclinical hyperthyroidism from Graves' disease in her age group per current guidelines?

• A TSH < 0.1 mU/L alone is sufficient indication
• B Symptoms of anxiety regardless of bone density or cardiac status
• C Anti-TSH receptor antibody positivity alone mandates treatment
• D Presence of atrial fibrillation or reduced bone density in addition to TSH < 0.1 mU/L ✓

Explanation

Current ATA/ETA guidelines recommend treating subclinical hyperthyroidism (TSH < 0.1 mU/L) when there are additional risk factors such as atrial fibrillation, osteoporosis, or symptoms in patients over 65. In younger asymptomatic patients with normal bone density and no cardiac risk, observation is acceptable. Anti-TSH receptor positivity alone does not mandate treatment.

Reference: Harrison's Principles of Internal Medicine, 21st ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.