three common thyroid diagnoses
Last reviewed 01/2018
The three common thyroid diagnoses are:
- primary hypothyroidism:
- hypothyroidism due to thyroid disease
- TSH is elevated
- free T3 and free T4 are low
- secondary hypothyroidism:
- hypothyroidism due to pituitary disease
- TSH is low or normal
- free T3 and free T4 are low
- hyperthyroidism:
- TSH levels are low
- free T3 and free T4 are high
- T3 levels may be elevated earlier in the disease