Diagnosis of hypothyroidism will be based on a full clinical history, physical examination and blood tests. In some cases, ultrasound of the neck may also be prescribed.
Blood test of serum TSH and free T4 levels is the more definitive diagnostic tool. Based on the results, the type of hypothyroidism can be identified.
TYPE
SERUM TSH
FREE T4
Primary Hypothyroidism
High
Low
Secondary Hypothyroidism
Low or normal
Low
Subclinical Hypothyroidism
High (on…
