Thyroid Case Studies: 1 A 56 year old woman in a pre-comatose state with a temperature of 34C and an enlarged thyroid gland. Hb g/dL, MCV- 105 fL Na mmol/L, cholesterol mg/dL, LD U/L, ALT - 38 U/L, AST- 70 U/L, CK U/L

Thyroid Case Studies: 2 A 60 year old woman recovering from an acute myocardial infarction is suspected of being hypothyroid. She is on the following medications: digoxin, prednisone and lasix. TSH μU/mL, FT ng/dL, T ng/dL

Thyroid Case Studies:3 A 28 year-old 3 months post-partum patient with signs and symptoms of hyperthyroidism including a smooth enlargement of the thyroid gland TSH - <0.1μU/mL, FT ng/dL T ng/dL, 24h RAI - <2 percent

Thyroid Case Studies: 4 A 50 year old woman undergoing a routine physical examination TSH - 9uU/mL, FT ng/dL, antimicrosomal antibody titer - positive at a 1: 128 dilution

Thyroid Case Studies: 5 One month after the institution of replacement therapy ( 100 μg T4 daily) for primary hypothyroidism, a 46 year old man has the following test results: TSH - 50 μU/mL, FT ng/dL

Thyroid Case Studies: 6 Three months after the institution of T4 replacement therapy in a 55 year old woman, the following values are obtained: TSH - 30 μU/mL, FT ng/dl

Thyroid Case Studies: 7 A 33 year old woman on oral contraceptive therapy is investigated for suspected hypothyroidism. TSH - 20 μU/mL, FT ng/dL, Total T μg/dL, Repeat TSH - 22 μU/mL Repeat TSH (using an alternative technique) μU/mL