Stages of Illness

T4

T3

RT3

FT4

TSH

∆TSH*

I (Mild)

N or ↑ or ↓

↓

↑

N

N

N

II (Severe)

N or ↓

↓↓

↑↑

N

N

↓

III (Critical)

↓↓

↓↓↓

↑↑↑

N

↓

↓↓

IV (Early Recovery)

↓

↓

↑

N

↑

↑

V (Post Recovery

N

N

N

N

N

N