TSH
Low or undetectable
Free T3/T4
Elevated
Chemistry
Calcium may be elevated
Hyperglycemia often present 
CBC
May have thrombocytopenia
Leukocytosis common 
LFTs
Mild elevation in AST, ALT, LDH, bilirubin, ALP may be seen 
Cortisol level (rule-out concurrent adrenal insufficiency)
ECG
Rule out infection:
CXR
Blood culture
UA
Consider lumbar puncture after CTH
Low or undetectable
Elevated
Calcium may be elevated
Hyperglycemia often present 
May have thrombocytopenia
Leukocytosis common 
Mild elevation in AST, ALT, LDH, bilirubin, ALP may be seen 
CXR
Blood culture
UA
Consider lumbar puncture after CTH

Scoring
>45 = Highly suggestive of<unk> 
25-44 = Suggestive of impending<unk> 
<25 = Unlikely to represent<unk>
Thyroid storm
Sympathomimetic ingestion
Adrenal crisis
Atherosclerosis
Cushing's syndrome
Aortic regurgitation
Diabetic ketoacidosis
Thyrotoxicosis