41 year old man with weight loss and palpitations

Lab Results

Results of appropriate testing return and show the following:

Blood:

Test (units) Result Results (SI Units)
CBC:
Hb 14.5 gm/dL 145 g/L
WBC 7,800/mcL 7.8 x 109/L
Platelets 300,000/mcL 300 x 109/L
Random glucose 126 mg/dL 7 mmol/L

Serum:

Test (units) Result Results (SI Units)
Na+ 138 mEq/L 138 mmol/L
K+ 3.7 mEq/L 3.7 mmol/L
Cl- 101 mEq/L 101 mmol/L
HCO3- 26 mEq/L 26 mmol/L
Creatinine 1.0 mg/dL 89 micromol/L
TSH <0.01 mU/L Normal 0.35-5.5 mU/L
FT4 4.2 ng/dL (54 pmol/L) Normal 0.9-1.7 ng/dL [12-22 pmol/L]
FT3 15.5 pg/mL (24 pmol/L) Normal 2.3-4.3 pg/mL [3.5-6.5 pmol/L]

ECG: Sinus tachycardia at 110/min, otherwise normal


Chest x-ray: Clear lung fields, normal cardiac silhouette