mrcem2-0561

mrcem2-0561

A 70 year old male presents to the emergency department feeling generally fatigued. On taking a history the patient reports a decline in his skin and hair condition over the past few months. Thyroid function tests are ordered which show the following:

Test Result Normal range
TSH 6.2 miU/L 0.27 – 4.2 miU/L
Free T4 13 pmol/L 12.0 – 22.0 pmol/L

What is the diagnosis?