Strategy for the Laboratory Evaluation of Patients with Suspected Hypothyroidism. - Flowchart
Strategy for the Laboratory Evaluation of Patients with Suspected Hypothyroidism. - Flowchart Hypothyroidism Hypothyroidism
«Flowchart»

Suspected hypothyroidism

Suspected hypothyroidism

Suspected hypothyroidism

Rule out early hypothyroidism, Hashimoto thyroiditis, subacute thyroiditis, autoimmune lymphocytic thyroiditis, recovery from severe illness

Rule out early hypothyroidism, Hashimoto thyroiditis, subacute thyroiditis, autoimmune lymphocytic thyroiditis, recovery from severe illness

Rule out early hypothyroidism, Hashimoto thyroiditis, subacute thyroiditis, autoimmune lymphocytic thyroiditis, recovery from severe illness

Rule out secondary hypothyroidism (hypopituitarism)

Rule out secondary hypothyroidism (hypopituitarism)

Rule out secondary hypothyroidism (hypopituitarism)

Primary hypothyroidism

Primary hypothyroidism

Primary hypothyroidism

TSH, free T4

TSH, free T4

TSH, free T4

4

Normal/low TSH, low free T4

Normal/low TSH, low free T4

4 Normal

Elevated TSH, normal/low free T4

Elevated TSH, normal/low free T4

4 Elevated TSH, normal

Elevated TSH, low free T4

Elevated TSH, low free T4

4 Elevated TSH

MRI of pituitary gland

MRI of pituitary gland

MRI of pituitary gland

End

End

End

MRI, Magnetic resonance imaging.

MRI, Magnetic resonance imaging.

MRI, Magnetic resonance imaging.

MRI