Hypothyroidism classification

Hypothyroidism Main page
Patient Information
Overview
Classification Primary hypothyroidism Hashimoto's thyroiditis Secondary hypothyroidism Tertiary hypothyroidism
Differentiating different causes of hypothyroidism
Screening
Diagnosis
History and symptoms

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Classification

Hypothyroidism may be classified according to TSH levels into 3 different sub types: Primary hypothyroidism, subclinical hypothyroidism, and central hypothyroidism

Type		TSH level	Origin
Primary hypothyroidism		↑↑	thyroid gland
Subclinical hypothyroidism		↑
Central hypothyroidism	Secondary hypothyroidism	↓	pituitary gland
	Tertiary hypothyroidism (hypothalamic-pituitary-axis hypothyroidism)	↓	hypothalamus